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Copernicus [Copernicus 词源字典]: Latinized form of name of Mikolaj Koppernigk (1473-1543), physician and canon of the cathedral of Frauenburg. His great work was "De Revolutionibus Orbium Coelestium."[Copernicus etymology, Copernicus origin, 英语词源]
copesetic (adj.): see copacetic.
copier (n.): 1590s, agent noun from copy (v.).
copilot (n.): 1927, from co- + pilot (n.).
coping (n.): c. 1600 as an architectural term, from cope (n.), the cape-like vestment worn by priests (14c.), a variant of cape. Coping saw attested by 1931.
copious (adj.): mid-14c., from Latin copiosus "plentiful," from copia "an abundance, ample supply, profusion, plenty," from com- "with" (see com-) + ops (genitive opis) "power, wealth, resources," from PIE root *op- (1) "to work, produce in abundance," (see opus). Related: Copiously.
coplanar (adj.): 1862, from co- + planar.
copout: see cop out.
copper (n.1): malleable metallic element, Old English coper, from Proto-Germanic *kupar (cognates: Middle Dutch koper, Old Norse koparr, Old High German kupfar), from Late Latin cuprum, contraction of Latin Cyprium (aes) "Cyprian (metal)," after Greek Kyprios "Cyprus" (see Cyprus).

Latin aes originally was "copper," but this was extended to its alloy with tin, bronze, and as this was far more extensively used than pure copper, the word's primary sense shifted to the alloy and a new word evolved for "copper," from the Latin form of the name of the island of Cyprus, where copper was mined. Aes passed into Germanic (which originally did not distinguish copper from its alloys) and became English ore. In Latin, aes was the common word for "cash, coin, debt, wages" in many figurative expressions. Chemical symbol Cu is from cuprum.
copper (n.2): "policeman," 1846; agent noun from cop (v.).
copperhead (n.): Trigonocephalus contortrix, 1775, American English, so called for color markings between its eyes; see copper + head (n.). Poisonous "sneak snakes" (because they bite without warning), the name is said to have been first used in reference to Northerners suspected of Southern sympathies in Greeley's New York "Tribune," July 20, 1861. Charles H. Coleman, "The Use of the Term 'Copperhead' During the Civil War" ["Mississippi Valley Historical Review" 25 (1938), p.263] traces it to an anonymous letter against Ohio anti-war Democrats in the Cincinnati "Commercial" newspaper in the summer of 1861. It seems not to have been in widespread use until summer 1862.
coppice (n.): late 14c., "small thicket of trees grown for cutting," from Old French copeiz, coupeiz "a cut-over forest," from Vulgar Latin *colpaticium "having been cut," ultimately from Latin colaphus "a blow with the fist," from Greek kolaphos "blow, cuff" (see coup).
copra (n.): dried kernel of coconut, 1580s, from Portuguese copra (16c.), from Malayalam koppara (cognate with Hindi khopra) "coconut;" related to Hindi khopri "skull," from Sanskrit kharparah "skull."
copro-: word-forming element indicating "dung, filth, excrement," before vowels copr-, from Modern Latin copro-, from Greek kopros "dung," from PIE root *kekw-. Hence, coprology "study of obscene literature."
coprolalia (n.): "obsessive use of obscene language, either through mental illness or perversion," 1886, from French coprolalie, coined 1885 by de la Tourette, from copro- "dung, filth" + Greek lalia "talk, prattle, a speaking," from lalein "to speak, prattle," of echoic origin.
coprolite (n.): fossil dung, 1829, from copro- + -lite, from French, for -lithe, from Greek lithos "stone" (see litho-).
coprophagia (n.): 1906, in Havelock Ellis, Latinized from coprophagy (q.v.).
coprophagy (n.): 1891, from Modern Latin coprophagus, from Greek koprophagos "dung-eating," from kopros "dung" (see copro-) + -phagos (see -phagous). Related: Coprophagous.
coprophilia (n.): "attraction to defecation and feces," 1934, from copro- + -philia.
copse (n.): 1570s, "small wood grown for purposes of periodic cutting," contraction of coppice.