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copperas

noun cop·per·as \ˈkä-p(ə-)rəs\

Definition of COPPERAS

Origin of COPPERAS

Middle English coperas, from Anglo-French coperose, from Medieval Latin cuprosa, probably from aqua cuprosa, literally, copper water, from Late Latin cuprum
First Known Use: 14th century

copperas

noun cop·per·as \ˈkäp-(ə-)rəs\   (Medical Dictionary)

Medical Definition of COPPERAS

:  a green hydrated ferrous sulfate FeSO4·7H2O used especially in making inks and pigments—used especially of commercial grades not to be used internally

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