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copperas

noun

Etymology

From Middle English coperas, coperose (“metallic sulfate”), from Old French coperose. Compare French couperose (“sulfate”), Medieval Latin cuprosa, Late Latin aqua cuprosa, Latin cupri rosa, "rose of copper".

  1. derived from coperose
  2. inherited from coperas

Definitions

  1. 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[…]
    • […] what a change has introduced itself everywhere into human affairs! How human affairs shall now circulate everywhere not healthy life-blood in them, but, as it were, a detestable copperas banker’s ink;

  2. An obsolete sulphate compound with one of the three metals, zinc, copper or iron.

The neighborhood

Vish — recursive loop

No curated loop yet for copperas. Loops are being traced one word at a time while the ingestion pipeline matures.

sense glosses and etymology drawn from English Wiktionary · source · CC-BY-SA