Copperas

Cop"per*as

(?), n. [OE. coperose, F. couperose, fr. (assumed?) L. cuprirosa, equiv. to G. cha`lkanqos, i. e. copper flower, vitriol. See Copper and Rose.] Green vitriol, or sulphate of iron; a green crystalline substance, of an astringent taste, used in making ink, in dyeing black, as a tonic in medicine, etc. It is made on a large scale by the oxidation of iron pyrites. Called also ferrous sulphate.
[1913 Webster]

The term copperas was formerly synonymous with vitriol, and included the green, blue, and white vitriols, or the sulphates of iron, copper, and zinc.
[1913 Webster]

copper-bottom

,

copperbottom

v. t. to provide with a copper bottom.
Syn. -- copperbottom.
[WordNet 1.5]

2. to bind with a cord, tie with a cord.
Syn. -- cord up.
[WordNet 1.5]

 

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Tue 11th December 2018