The Collaborative International Dictionary
Cupreous
Cupreous \Cu"pre*ous\ (k?"pr?-?s), a. [L. cupreus, fr. cuprum.] Consisting of copper or resembling copper; coppery.
Douglas Harper's Etymology Dictionary
cupreous
1660s, from Late Latin cupreus "of copper," from cuprum, alternative form of cyprum "copper" (see copper (n.1)). Related: Cupric (1799).
Wiktionary
cupreous
a. 1 Of or of the nature of copper. 2 (context chemistry English) Containing copper. 3 Of a reddish-brown color, like that of polished copper. n. A reddish-brown color, like that of polished copper.