copperas
English · Thesaurus
AI In plain words
Writing a short explanation…
Written by a house AI from the entry below, in your language. The entry itself is the source.
copperas
Where it comes from
From Middle English coperas, coperose (“any metallic sulfate”), from Medieval Latin cuprosa directly or via Old French coperose, from Medieval Latin aqua cuprosa (“cupreous water”), from Latin cuprum (“copper”) + -osa (“-ose: forming related adjectives”). Fanciful derivations from cupreous terms involving Latin rosa (“rose”) are mistaken.
noun copperases · coperas · copperose
- Any of various metallic sulphates formed from the reaction of sulfur with iron, zinc, or copper, especially (alchemy) solutions of such compounds misunderstood as a mediator or catalyst for the transmutation of iron into copper &c. The ſecond way whereby bodies become blacke, is an Atramentous condition or mixture, that is a vitriolate or copperoſe quality conjoyning with a terreſtrious and aſtringent humidity, for ſo is Atramentum ſcriptorium, or writing Inke commonly made, by copperoſe caſt upon decoction or infuſion of gall
-
Synonym of iron(II) sulfate.
It were superfluous to describe the Process of making the Aqua fortis; it shall suffice to let you know, that our common Coperas makes this Aquafortis well enough for our purpose[…]
Similar: iron(II) sulfate
Translations
Talk about this word "copperas." Wiktionary, via Micwyn, micwyn.com/word/copperas. Accessed 6 Nov. 2026. copperas. (n.d.). In Wiktionary, via Micwyn. Retrieved November 6, 2026, from https://micwyn.com/word/copperas "copperas." Wiktionary, via Micwyn. Accessed November 6, 2026. https://micwyn.com/word/copperas.Cite this
@misc{copperas_2026,
title = {copperas},
howpublished = {Wiktionary, via Micwyn},
year = {2026},
url = {https://micwyn.com/word/copperas},
urldate = {2026-11-06}
}
