English dictionary
copperas
/'k/A/p/@/r/@/s/
Definitions, examples, synonyms and antonyms from WordNet 3.0.
noun
-
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 <i>ferrous sulphate</i>.
Source: webster1913