COPPERAS


Meaning of COPPERAS in English

ˈkäp(ə)rəs noun

( -es )

Etymology: alteration of Middle English coperose, from Middle French coperose, couperose, from (assumed) Vulgar Latin cuprirosa, from Late Latin cupri- (from cuprum copper) + Latin rosa rose — more at rose

1. obsolete : vitriol 1a

2. : green ferrous sulfate heptahydrate

3. archaic : a green obtained by use of copperas in dyeing — used attributively especially of trousers

Webster's New International English Dictionary.      Новый международный словарь английского языка Webster.