copperas Hear it!

copperas definition

cop·peras (käp′ər əs)

noun

ferrous sulfate

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

Webster's New World College Dictionary Copyright © 2009 by Wiley Publishing, Inc., Cleveland, Ohio.
Used by arrangement with John Wiley & Sons, Inc.

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