• (n.) 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.
Found on
http://thinkexist.com/dictionary/meaning/copperas/
The impure commercial variety of ferrous sulfate. ... (05 Mar 2000) ...
Found on
http://www.encyclo.co.uk/local/20973
Cop'per·as noun [ Middle English
coperose , French
couperose , from (assumed?) Latin
cuprirosa , equiv. to German
cha`lkanqos , i. e. copper flower, vitriol. See
Copper and
Rose. ] Green vitriol, or sulphate of iron; a green crystalline substance, of an a...
Found on
http://www.encyclo.co.uk/webster/C/157
Type: Term Pronunciation: kop′er-as Definitions: 1. The impure commercial variety of ferrous sulfate.
Found on
http://www.medilexicon.com/medicaldictionary.php?t=20283
Copperas is a sulphate of iron or green vitriol, a salt of a peculiar astringent taste and of a fine green colour. When exposed to the air it assumes a brownish hue. It is much used in dyeing black and in making ink, and in medicine as a tonic. The copperas of commerce is usually made by the decomposition of iron pyrites.
Found on
http://www.probertencyclopaedia.com/browse/HC.HTM
Hydrated ferrous sulfate
Found on
http://www.translationdirectory.com/glossaries/glossary071.htm
Melanterite
Found on
http://www.translationdirectory.com/glossaries/glossary077.htm
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. Note: The term copperas was formerly synonymous with vitriol, and included the green, blue, and white...
Found on
http://www2.shu.ac.uk/sfca/glossary.cfm
(blue) Copper sulphate crystals
Found on
https://oldcopper.org/special_topics/glossary.php
No exact match found.
