noun Etymology: Middle English coperas, from Anglo-French coperose, from Medieval Latin cuprosa, probably from aqua cuprosa, literally, copper water, from Late Latin cuprum Date: 14th century ferrous sulfate

New Collegiate Dictionary. 2001.


Look at other dictionaries:

  • Copperas — Cop per*as, n. [OE. coperose, F. couperose, fr. (assumed?) L. cuprirosa, equiv. to G. cha lkanqos, i. e. copper flower, vitriol. See {Copper} and {Rose.}] Green vitriol, or sulphate of iron; a green crystalline substance, of an astringent taste,… …   The Collaborative International Dictionary of English

  • copperas — [käp′ər əs] n. [ME & OFr coperose < ML coperosium, prob. < * (aqua) cuprosa, lit., copper (water) < L cupreus, of copper] FERROUS SULFATE …   English World dictionary

  • copperas — Green Green (gr[=e]n), a. [Compar. {Greener} (gr[=e]n [ e]r); superl. {Greenest.}] [OE. grene, AS. gr[=e]ne; akin to D. groen, OS. gr[=o]ni, OHG. gruoni, G. gr[ u]n, Dan. & Sw. gr[ o]n, Icel. gr[ae]nn; fr. the root of E. grow. See {Grow.}] 1.… …   The Collaborative International Dictionary of English

  • copperas — noun ferrous sulfate […] what a change has introduced itself everywhere into human affairs! How human affairs shall now circulate everywhere not healthy life blood in them, but, as it were, a detestable copperas banker’s ink; …   Wiktionary

  • copperas — /kop euhr euhs/, n. Chem. See ferrous sulfate. [1400 50; late ME coperas, var. of ME coperose < ML (aqua) cuprosa copperish (water). See COPPER1, OSE1] * * * …   Universalium

  • copperas — The impure commercial variety of ferrous sulfate. * * * cop·per·as käp (ə )rəs n a green hydrated ferrous sulfate FeSO4·7H2O used esp. in making inks and pigments used esp. of commercial grades not to be used internally * * * cop·per·as… …   Medical dictionary

  • copperas — cop·per·as || kÉ’pÉ™rÉ™s n. sulfate of iron (chemical substance) …   English contemporary dictionary

  • copperas — [ kɒp(ə)rəs] noun green crystals of hydrated ferrous sulphate, especially as an industrial product. Origin ME coperose, from OFr. couperose, from med. L. cuperosa, lit. flower of copper , from late L. cuprum (see copper1) + rosa rose ,… …   English new terms dictionary

  • copperas — n. Green vitriol, sulphate of iron (crystallized) …   New dictionary of synonyms

  • copperas — cop·per·as …   English syllables

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