Online Etymology Dictionary

-iatry: word-forming element meaning "medical treatment," from French -iatrie, from Greek iatreia "healing, medical treatment" (see -iatric).
magni-: word-forming element meaning "great," from Latin magni-, comb. form of magnus "great" (see magnate (n.)).
magneto-: word-forming element meaning "magnetic, magnetism," from Greek magneto-, combining form of magnes (see magnet).
marrowbone (n.): late 14c., from marrow + bone (n.). A poetic Old English word for "bone" was mearhcofa "marrow-chamber."
matri-: word-forming element meaning "mother," from comb. form of Latin mater (genitive matris) "mother" (see mother (n.1)).
loco-: word-forming element meaning "from place to place," from comb. form of Latin locus (see locus).
longi-: word-forming element meaning "long," from Latin longi-, comb. form of longus (see long (adj.)).
lumbo-: word-forming element meaning "loin, loins," from comb. form of Latin lumbus (see lumbago).
-lyze: word-forming element for making verbs corresponding to nouns in -lysis. Chiefly U.S.; the British preferring -lyse.
latterly (adv.): 1734, from latter (adj.) + -ly (2). Called by Johnson [1755] "a low word lately hatched." Related: Lattermost.
biblico-: word-forming element meaning "biblical," from comb. form of Medieval Latin biblicus, from biblia (see bible).
bloop (n.): 1931, from bloop (v.), 1926, a word from the early days of radio (see blooper). Related: Blooped; blooping.
anarch (n.): "leader of leaderlessness," 1660s, a deliciously paradoxical word used by Milton, Pope, Byron; see anarchy.
aceto-: before vowels acet-, word-forming element from comb. form of acetic and generally indicating compounds from or related to acetic acid.
undertaking (n.): "enterprise," early 15c., verbal noun from undertake (v.). An Old English word for this was underfangenes.
mini-: word-forming element meaning "miniature, minor," abstracted from miniature, with sense perhaps influenced by minimum.
medio-: word-forming element from comb. form of Latin medius "middle" (see medial (adj.)).
mechano-: word-forming element meaning "mechanics, mechanism," from Greek mekhano-, comb. form of mekhane (see machine (n.)).
moto-: word-forming element meaning "motion, motor," from Latin motus, past participle of movere (see move (v.)).
radical (n.): 1630s, "root part of a word, from radical (adj.) Political sense from 1802; chemical sense from 1816.
nona-: before vowels non-, word-forming element from comb. form of Latin nonus "ninth" (see nones).
noso-: word-forming element meaning "disease," from comb. form of Greek nosos "disease, sickness, malady," of unknown origin.
-oidal: word-forming element making adjectives from nouns in -oid; see -oid + -al (1).
oeno-: also oino-, word-forming element meaning "pertaining to wine," from comb. form of Greek oinos "wine" (see wine (n.)).
oneiro-: before vowels oneir-, word-forming element meaning "dream," from Greek oneiros "a dream," from PIE *oner- "dream."
-phyte: word-forming element meaning "plant, plant characteristic; planting, growth; abnormal growth," from Greek phyton "plant" (see phyto-).
-phage: word-forming element meaning "eater," from stem of Greek phagein "to eat" (see -phagous).
Panavision (n.): 1955, proprietary name of a type of wide-screen lens, word formed from elements of panorama + vision.
musculo-: word-forming element meaning "involving or pertaining to muscles," from comb. form of Latin musculus "muscle" (see muscle (n.)).
myelo-: before vowels myel-, word-forming element meaning "marrow, spinal cord," from Greek myelos "marrow; the brain," of unknown origin.
oleo-: word-forming element meaning "oil" or "oleic," from Latin oleum (see oil (n.)).
omphalo-: before vowels omphal-, word-forming element meaning "navel," from Greek omphalos (see omphalos).
plani-: word-forming element meaning "level, plane," from Latin plani-, from planus "flat, level" (see plane (n.1)).
petro- (2): word-forming element used from mid-20c. to mean "of or having to do with petroleum products," from petroleum.
phago-: word-forming element meaning "eating," from Greek phago- "eating, devouring," (see -phagous).
physico-: word-forming element meaning "physical, physically; natural," from Latinized comb. form of Greek physikos "natural, physical" (see physic).
captaincy (n.): 1818, from captain (n.) on the model of lieutenancy or some similar word where the -c- is etymologically justified.
cero-: word-forming element meaning "waxy," from Latinized form of Greek kero-, comb. form of keros (see cere (n.)).
dextro-: word-forming element meaning "toward or on the right-hand side," from comb. form of Latin dexter (see dexterity).
pitheco-: before vowels pithec-, word-forming element meaning "pertaining to an ape or monkey," from Greek pithekos "ape."
plumbo-: word-forming element meaning "lead" (the metal), from comb. form of Latin plumbum "lead" (see plumb (n.)).
pneumo-: before vowels pneum-, word-forming element meaning "lung," from comb. form of Greek pneumon (see pneumonia).
psittacine (adj.): "pertaining to parrots," 1826, from Latin psittacinus, from psittacus "parrot," from Greek psittakos "a parrot," said to be a foreign word.
Christ-like (adj.): 1670s, from Christ + like (adj.). Old English had cristlic, but the modern word appears to be a more recent formation.
chromato-: before vowels chromat-, word forming element indicating "color; chromatin," from Latinized form of Greek khromato-, from khroma (see chroma).
cirro-: word-forming element meaning "involving cirrus clouds," from comb. form of Latin cirrus (see cirrus).
politico-: word-forming element meaning "political and," from Latinized comb. form of Greek politikos (see political).
polysyllable (n.): 1560s; see poly- + syllable. As a rule, a word of more than three syllables.
potage (n.): "thick soup," 1560s, from French potage "soup, broth" (see pottage, which is an earlier English borrowing of the same French word).
pyo-: word-forming element meaning "pus," from comb. form of Greek puon "pus" (see pus).