Online Etymology Dictionary

green (n.): late Old English, "green color or pigment, spectral color between blue and yellow;" also "a field, grassy place; green garments; green foliage," from green (adj.). Specific sense "piece of grassland in a village belonging to the community" is by late 15c. In golf, "the putting portion of the links" by 1849. Symbolic of inconstancy since late 14c., perhaps because in nature it changes or fades. Also symbolic of envy and jealousy since Middle English. Shakespeare's green-eyed monster of "Othello" sees all through eyes tinged with jealousy. "Greensleeves," ballad of an inconstant lady-love, is from 1570s. The color of the cloth in royal counting houses from late 14c., later the color of the cloth on gambling tables.
green (v.): Old English grenian "to become green, flourish" (see green (adj.)). Compare Dutch groenen, German grünen, Old Norse grona. Meaning "to make green" is 1560s. Related: Greened; greening.
green (adj.): Old English grene, Northumbrian groene "green, of the color of living plants," in reference to plants, "growing, living, vigorous," also figurative, of a plant, "freshly cut," of wood, "unseasoned" earlier groeni, from Proto-Germanic *gronja- (source also of Old Saxon grani, Old Frisian grene, Old Norse grænn, Danish grøn, Dutch groen, Old High German gruoni, German grün), from PIE root *ghre- "grow" (see grass), through sense of "color of growing plants."

From c. 1200 as "covered with grass or foliage." From early 14c. of fruit or vegetables, "unripe, immature;" and of persons, "of tender age, youthful, immature, inexperienced;" hence "gullible, immature with regard to judgment" (c. 1600). From mid-13c. in reference to the skin or complexion of one sick.

Green cheese originally was that which is new or fresh (late 14c.), later with reference to coloring; for the story told to children that the moon is made of it, see cheese (n.1). Green light in figurative sense of "permission" is from 1937 (Green and red as signals on railways first attested 1883, as nighttime substitutes for semaphore flags). Green thumb for "natural for gardening" is by 1938. Green beret originally "British commando" is from 1949. Greenroom "room for actors when not on stage" is from 1701; presumably a once-well-known one was painted green. The color of environmentalism since 1971.
sea-green (n.): as a color, 1590s, from sea + green (adj.). As an adjective from c. 1600.
Gretna Green: town in Scotland just across the border, proverbial from late 18c. as the customery place for English couples to run off and be married without parental consent.
greens (n.): c. 1400, "vegetables;" 1690s, "freshly cut branches used for decoration," from green (n.). Meaning "ecology political party" first recorded 1978, from German die Grünen (West Germany), an outgrowth of Grüne Aktion Zukunft "Green Campaign for the Future," a mainly anti-nuclear power movement, and/or grüne Listen "green lists" (of environmental candidates). Green (adj.) in the sense of "environmental" is attested in English from 1971; Greenpeace, the international conservation and environmental protection group, is from 1971.
greenhouse (n.): also green-house, 1660s, from green (n.) + house (n.). Greenhouse effect attested from 1937.
greengage (n.): type of plum, from green (adj.) + name of English botanist Sir William Gage (1657-1727) who first cultivated it in England c. 1725. In early 20c., rhyming slang for "stage."
greenish (adj.): late 14c., from green (adj.) + -ish.
greengrocer (n.): 1723, from green (n.) "vegetable" + grocer.
greenness (n.): Old English grennes "green color; quality of being green," in plural, "green things, plants;" see green (adj.) + -ness. Meaning "immaturity" is from early 15c. Walpole coined greenth (1753) in the same sense.
greenery (n.): "mass of green plants or foliage," 1797, from green (n.) + -ery. From 1836 as "place where plants are reared."
greenhead (n.): 1580s, "young, untrained intellect," from green (adj.) + head (n.). As a type of biting fly with a green-colored head, by 1837.
greenback (n.): "U.S. dollar bill," 1862, so called from the time of their introduction, from green (adj.) + back (n.); bank paper money printed in green ink had been called this since 1778 (as opposed to redbacks, etc.).
greenhorn (n.): mid-15c., "horn of an animal recently killed," also "young horned animal," from green (adj.) in sense of "new, fresh, recent" + horn (n.). Applied to new soldiers from c. 1650; extended to any inexperienced person by 1680s.
Greenland: translating Old Norse Groenland, so named by its discoverer (986 C.E.) because "it would induce settlers to go there, if the land had a good name":
Hann gaf nafn landinu ok kallaði Groenland, ok kvað menn þat myndu fysa þangat farar, at landit ætti nafn gott. [Islendingabok, 1122-1133]
See green (adj.) + land (n.). Related: Greenlander; Greenlandish.
grass (n.): Old English græs, gærs "herb, plant, grass," from Proto-Germanic grasan (source also of Old Norse, Old Saxon, Dutch, Old High German, German, Gothic gras, Swedish gräs), from PIE *ghros- "young shoot, sprout," from root *ghre- "to grow, become green" (related to grow and green, but not to Latin gramen).

As a color name (especially grass-green, Old English græsgrene) by c. 1300. Sense of "marijuana" is recorded by 1932, American English. The grass skirt worn by people native to tropical regions is mentioned by 1874; the warning to keep off the grass by 1843 (in New York City's Central Park). Grass-fed of cattle, etc., (opposed to stall-fed) is from 1774.
wintergreen (n.): type of plant, 1540s, from winter (n.) + green (n.). So called from keeping green through the winter.
evergreen (n.): 1640s in reference to trees and shrubs, from ever + green (adj.). From 1660s as an adjective; figurative sense from 1871.
Greenwich: town on the south bank of the Thames adjoining London, Old English Gronewic (918), Grenewic (964), literally "green harbor" or "green trading place." The Royal Observatory there was founded June 22, 1675, by King Charles II specifically to solve the problem of finding longitude while at sea. In October 1884, 41 delegates from 25 nations met in Washington, D.C., for the International Meridian Conference. They decided to adopt a single world meridian, passing through the principal Transit Instrument at the observatory at Greenwich, as the basis of calculation for all longitude and a worldwide 24-hour clock. The Greenwich motion passed 22-1; San Domingo voted against it; France and Brazil abstained. The Greenwich Village quarter of New York City has been symbolic of "American bohemia" at least since 1903.
Kelly: common Irish surname, from Old Irish ceallach "war." As a type of pool played with 15 balls, it is attested from 1898. Kelly green first recorded 1917.
lime (n.2): greenish-yellow citrus fruit, 1630s, probably via Spanish lima, from Arabic limah "citrus fruit," from Persian limun "lemon" (see lemon (n.1)). Lime-green as a color is from 1890.
fiddler (n.): late 13c., from Old English fiðelere "fiddler" (fem. fiðelestre), agent noun from fiddle (v.). Similar formation in Dutch vedelaar, German Fiedler, Danish fidler. Fiddler's Green "sailor's paradise" first recorded 1825, nautical slang. Fiddler crab is from 1714.
Lincoln: county town of Lincolnshire, Old English Lindcylene, from Latin Lindum Colonia from a Latinized form of British *lindo "pool, lake" (corresponding to Welsh llyn). Originally a station for retired IX Legion veterans. Lincoln green as a type of dyed cloth fabric made there is from c. 1500.

In reference to U.S. president Abraham Lincoln (1809-1865), Lincolnesque is from 1894 (earliest reference is to the beard); Lincolniana is from 1862.
wig (v.): 1826, "supply with a wig," from wig (n.). The earlier verb was bewig. The meaning "to behave hysterically" (usually with out) is attested from 1955, perhaps from notion in flip one's wig. Compare dash my wig!, a former mild imprecation (1797), also wigs on the green (1856), Irish colloquial for "a fight or rumble" (because wigs are likely to get detached from owners in such an event). The verb also had a colloquial sense of "scold severely," attested by 1829, perhaps related to these. Related: Wigged; wigging.
pooh: 1590s, "a 'vocal gesture' expressing the action of puffing anything away" [OED], first attested in Hamlet Act I, Scene III, where Polonius addresses Ophelia with, "Affection! pooh! you speak like a green girl, / Unsifted in such perilous circumstance. / Do you believe his tenders, as you call them?" But the "vocal gesture" is perhaps ancient.
verdant (adj.): 1580s, "green in color; green with vegetation," from Middle French virdeant "becoming green," present participle of Old French verdeiier "become green," from Vulgar Latin *viridiare "grow green, make green," from Latin viridis "green" (see verdure). Related: Verdantly; verdancy.
Glasgow: city in Scotland, from Gaelic, literally "green hollow," from glas "green, verdant" + cau "hollow."
cheese (n.1): Old English cyse (West Saxon), cese (Anglian) "cheese," from West Germanic *kasjus (source also of Old Saxon kasi, Old High German chasi, German Käse, Middle Dutch case, Dutch kaas), from Latin caseus "cheese" (source of Italian cacio, Spanish queso, Irish caise, Welsh caws).

Of unknown origin; perhaps from a PIE root *kwat- "to ferment, become sour" (source also of Prakrit chasi "buttermilk;" Old Church Slavonic kvasu "leaven; fermented drink," kyselu "sour," -kyseti "to turn sour;" Czech kysati "to turn sour, rot;" Sanskrit kvathati "boils, seethes;" Gothic hwaþjan "foam"). Also compare fromage. Old Norse ostr, Danish ost, Swedish ost are related to Latin ius "broth, sauce, juice."

Earliest references would be to compressed curds of milk used as food; pressed or molded cheeses with rinds are 14c. Transferred to other cheese-like substances by 1530s. As a photographer's word to make subjects hold a smile, it is attested from 1930, but in a reminiscence of schoolboy days, which suggests an earlier use. Probably for the forced smile involved in making the -ee- sound. Green cheese is that newly made; the notion that the moon is made of green cheese as a type of a ridiculous assertion is from 1520s. To make cheeses was a schoolgirls' amusement (1835) of wheeling rapidly so one's petticoats blew out in a circle then dropping down so they came to rest inflated and resembling a wheel of cheese; hence, used figuratively for "a deep curtsey."
vert (n.): mid-15c., "the color green" (especially in heraldry), also "trees and brush bearing green leaves" (in forest law), from Anglo-French and Old French vert "foliage, greenery, green cloth," from Latin viridem, viridis "green" (see verdure).
little (adj.): Old English lytel "not large, not much, small in size or number; short in distance or time; unimportant," from Proto-Germanic *lutilla- (source also of Old Saxon luttil, Dutch luttel, Old High German luzzil, German lützel "little"), perhaps originally a diminutive of the root of Old English lyt "little, few," from PIE *leud- "small."

"Often synonymous with small, but capable of emotional implications which small is not" [OED]. Now with less, least, but formerly and in dialect littler, littlest. In terms of endearment from 1560s. Meaning "younger" (of a brother, sister, etc.) is from 1610s. As an adverb, Old English lytel.

Little while "a short time" is from 12c. Phrase the little woman "wife" attested from 1795. Little people "the faeries" is from 1726; as "children" it is attested from 1752; as "ordinary people" (opposed to the great) from 1827. Little death "orgasm" (1932) translates French petite mort. Little Neck clams (1884) are so called for Little Neck, a "neck" of land on Long Island's North Shore, where they first came into favor. Little green men "space aliens" is from 1950. Little boys' room (or girls') as a euphemism for "lavatory" is from 1957. Little breeches for "boy" is by 1785. Little black dress is from 1939.
At the beginning of summer, smart women who stay in town like to wear sheer "little black dresses." Because most "little black dresses" look alike, retailers struggle each year to find something which will make them seem new. ["Life," June 13, 1939]
verdure (n.): late 14c., "fresh green color," from Old French verdure "greenness, greenery, green fields, herbs," from verd, variant of vert "green" (12c.), from Latin viridis (source of Spanish, Italian verde), related to virere "be green," of unknown origin. Perhaps ultimately from a root meaning "growing plant" and cognate with Lithuanian veisti "propagate," Old Norse visir "bud, sprout," Old English wise "sprout, stalk, etc." Meaning "green plants, vegetation" is attested from c. 1400.
viridian (adj.): 1882, from the paint color name (1862), from Latin virid-, stem of viridis "green, blooming, vigorous" (see verdure) + -ian.
Chloe: fem. proper name, Latin, from Greek Khloe, literally "young green shoot;" related to khloros "greenish-yellow," from PIE *ghlo- variant of root *ghel- (2) "to shine," with derivatives referring to bright materials and gold, and bile or gall (such as Latin helvus "yellowish, bay," Gallo-Latin gilvus "light bay;" Lithuanian geltonas "yellow;" Old Church Slavonic zlutu, Polish żółty, Russian zeltyj "yellow;" Sanskrit harih "yellow, tawny yellow," hiranyam "gold;" Avestan zari "yellow") and "green" (such as Latin galbus "greenish-yellow;" Greek khloros "greenish-yellow color," kholos "bile;" Lithuanian zalias "green," zelvas "greenish;" Old Church Slavonic zelenu, Polish zielony, Russian zelenyj "green;" Old Irish glass, Welsh and Breton glas "green," also "gray, blue").

Buck says the interchange of words for yellow and green is "perhaps because they were applied to vegetation like grass, cereals, etc., which changed from green to yellow." It is possible that this whole group of yellow-green words is related to PIE root *ghlei- "to shine, glitter, glow, be warm" (see gleam (n.)).
chlorophyll (n.): green-colored stuff in plants, 1819, from French chlorophyle (1818), coined by French chemists Pierre-Joseph Pelletier (1788-1842) and Joseph Bienaimé Caventou (1795-1877) from Greek khloros "pale green" (see Chloe) + phyllon "a leaf" (see phyllo-).
thallium (n.): rare metallic element, 1861, Modern Latin, from Greek thallos "young shoot, green branch" (see thallus) + element name ending -ium. So called by its discoverer, Sir William Crookes (1832-1919), from the green line in its spectrum by which he detected it. Related: Thallic.
thallus (n.): 1829, Latin, from Greek thallos "green shoot, young branch, twig," related to thalia "abundance," thalos "scion, child," ultimately from PIE root *dhal- "to bloom" (source also of Armenian dalar "green, fresh," Albanian dal' "I sprout," Old Irish duilesc, a type of algae).
verdigris (n.): c. 1300, vertegrez, from Old French verte grez (13c.), verte de Grece (late 12c.), literally "green of Greece," from obsolete French verd, from Latin viridis (see verdure). The reason for it being called that is not known. In other languages, "green of Spain" (German grünspan, Danish spanskgrönt, Dutch spaansch-groen), from Medieval Latin viride Hispanum. Current spelling in English is from 1789. In chemistry, confined to a basic copper acetate; popularly applied to the green encrustation on copper or brass exposed to the air.
glaucous (adj.): "dull bluish-green, gray," 1670s, from Latin glaucus "bright, sparkling, gleaming," also "bluish-green," of uncertain origin, from Greek glaukos, a word used in Homer of the sea as "gleaming, silvery" (apparently without a color connotation); used by later writers with a sense of "greenish" (of olive leaves) and "blue, gray" (of eyes). Homer's glauk-opis Athene probably originally was a "bright-eyed," not a "gray-eyed" goddess. Greek for "owl" was glaux from its bright, staring eyes. Middle English had glauk "bluish-green, gray" (early 15c.).
vireo (n.): small American bird, 1834, a modern use of Latin vireo, a word Pliny applied to some kind of bird, believed to be the European greenfinch, from virere "be green" (see verdure).
folic (adj.): 1941, in folic acid, coined from Latin folium "a leaf" (see folio) + -ic. So called for its abundance in green leaves, such as those of spinach.
squash (n.1): gourd fruit, 1640s, shortened borrowing from Narraganset (Algonquian) askutasquash, literally "the things that may be eaten raw," from askut "green, raw, uncooked" + asquash "eaten," in which the -ash is a plural affix (compare succotash).
kendal (n.): green woolen cloth, late 14c., from place name in Westmoreland where it was manufactured. The place (which is in the Domesday Book) is "Kent-dale," so called for being in the dale of the River Kent.
chloro-: before vowels chlor-, word-forming element used in chemistry, usually indicating the presence of chlorine in a compound, but sometimes "green," from Latinized comb. form of Greek khloros (see Chloe); also compare chlorine.
celadon (n.): "pale grayish-green," 1768, from French Céladon, name of a character in the romance of "l'Astrée" by Honoré d'Urfé (1610); an insipidly sentimental lover who wore bright green clothes, he is named in turn after Greek Keladon, a character in Ovid's "Metamorphoses," whose name is said to mean "sounding with din or clamor." The mineral celadonite (1868) is so called for its color.
aquamarine (n.): 1590s, agmarine, "bluish-green type of beryl," from French or Provençal, from Latin aqua marina "sea water," from aqua "water" (see aqua-) + marina, fem. of marinus "of the sea" (see marine (adj.)). Apparently first used as a description of a bluish-green color by John Ruskin, 1846. Abbreviation aqua is attested from 1936.
praseodymium (n.): rare metallic element, 1885, coined in Modern Latin by discoverer Carl Auer von Welsbach (1858-1929) from Greek prasios "leek-green" (from prason "leek") + didymos "double," the name given to an earth in 1840, so called because it was a "twin" to lanthana. When didymia was further analyzed in the 1880s, it was found to have several components, one of which was characterized by green salts and named accordingly, with the elemental suffix -ium.
beryllium (n.): metallic element, 1863, so called because it figures in the composition of the pale green precious stone beryl and was identified in emerald (green beryl) in 1797 by French chemist Louis Nicolas Vauquelin (1763-1829) and first isolated in 1828. With metallic element ending -ium. At first and through 19c. also sometimes called glucinum or glucinium.
kale (n.): also kail, "cabbage, any kind of greens with curled or wrinkled leaves," c. 1300, a variant of cawul (see cole), surviving in Scottish and northern English. Slang meaning "money" is from 1902, from the notion of leaves of green.
pulsar (n.): 1968, from pulse (n.1), the form on analogy of quasar. When discovered in 1967, they were thought perhaps to be signals from alien civilizations and astronomers informally dubbed them LGM for "Little Green Men."