copperas

(käp′ər əs)

noun

ferrous sulfate

Origin: ME & OFr coperose < ML coperosium, prob. < *(aqua) cuprosa, lit., copper (water) < L cupreus, of copper

See copperas in American Heritage Dictionary 4

noun

Origin:

Origin: Middle English coperose, a metallic sulfate

Origin: , from Old French

Origin: , from Medieval Latin cuperōsa

Origin: , probably short for *aqua cuprōsa, copper water

Origin: , from Late Latin cuprum, copper; see copper ¹

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