1650s, "of or pertaining to Euclid" (Greek Eukleides), c. 300 B.C.E. geometer of Alexandria. Now often used in contrast to alternative models based on rejection of some of his axioms. His name in Greek means "renowned, glorious," from eu "well" (see eu-) + kleos "fame" (see Clio).
eubacteria
Euboea
eucalyptus
Eucharist
euchre
Euclidean
eudaemonic
Eudora
*eue-
Eugene
Eugenia