copperas

American  

[kop-er-uhs] / ˈkɒp ər əs /

noun

Chemistry.

1. ferrous sulfate.

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copperas British  

/ ˈkɒpərəs /

noun

1. a less common name for ferrous sulphate

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Etymology

Origin of copperas

1400–50; late Middle English coperas, variant of Middle English coperose < Medieval Latin ( aqua ) cuprōsa copperish (water). See copper ¹, -ose ¹

Example Sentences

See Examples For:

copperas

Early mine operators realized that they could also extract copper from copperas.

From Washington Times ● Jul. 3, 2017

Sprays April 1, April 30, and June 1, with London purple, copperas, Paris green, and Bordeaux mixture.

From The Apple by Various

Buy at a druggist's four ounces of the best blue Aleppo nut-galls; half an ounce of green copperas; and half an ounce of clean, white gum-arabic.

From The Ladies' Guide to True Politeness and Perfect Manners or, Miss Leslie's Behaviour Book by Eliza Leslie

Washing the ulcerated parts with warm soap-suds, copperas, and sugar-of-lead may follow.

From Domestic Animals History and description of the horse, mule, cattle, sheep, swine, poultry and farm dogs; with directions for their management, breeding, crossing, rearing, feeding, and preparation for a profitable market; also their diseases and remedies. Together with full directions for the management of the dairy. by Richard L. Allen

Sumach, logwood, iron liquor, and copperas, will form a black.

From Blacker's Art of Fly Making, &c. Comprising Angling, & Dyeing of Colours, with Engravings of Salmon & Trout Flies by William Blacker