Copperas - Definitions from Dictionary.com

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Dictionary.com Unabridged (v 1.1) - Cite This Source - Share This

cop·per·as

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s] Pronunciation Key

–noun Chemistry.

ferrous sulfate.

[Origin: 1400–50; late ME coperas, var. of ME coperose < ML (aqua) cuprōsa copperish (water). See copper¹, -ose¹

]

Dictionary.com Unabridged (v 1.1)
Based on the Random House Unabridged Dictionary, © Random House, Inc. 2006.

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Copperas

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American Heritage Dictionary - Cite This Source - Share This

cop·per·as Audio Help (kŏp'ər-əs) Pronunciation Key
n. See ferrous sulfate.

[Middle English coperose, a metallic sulfate, from Old French, from Medieval Latin cuperōsa, probably short for *aqua cuprōsa, copper water, from Late Latin cuprum, copper; see copper¹.]

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The American Heritage® Dictionary of the English Language, Fourth Edition
Copyright © 2006 by Houghton Mifflin Company.
Published by Houghton Mifflin Company. All rights reserved.

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ferrous sulfate
n. A greenish crystalline compound, FeSO₄·7H₂O, used as a pigment, fertilizer, and feed additive, in sewage and water treatment, and as a medicine in the treatment of iron deficiency. Also called copperas.

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The American Heritage® Dictionary of the English Language, Fourth Edition
Copyright © 2006 by Houghton Mifflin Company.
Published by Houghton Mifflin Company. All rights reserved.

U.S. Gazetteer - Cite This Source - Share This

Copperas Cove, TX (city, FIPS 16624) Location: 31.11875 N, 97.90178 W
Population (1990): 24079 (9307 housing units)
Area: 24.3 sq km (land), 0.0 sq km (water)

U.S. Gazetteer, U.S. Census Bureau

Webster's Revised Unabridged Dictionary - Cite This Source - Share This

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, used in making ink, in dyeing black, as a tonic in medicine, etc. It is made on a large scale by the oxidation of iron pyrites. Called also ferrous sulphate.

Note: The term copperas was formerly synonymous with vitriol, and included the green, blue, and white vitriols, or the sulphates of iron, copper, and zinc.

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