Where does “copperas” come from?

Copperas derives from Middle English coperas, of uncertain ultimate origin and meaning.

copperas (English): iron sulfate

Definitions

  1. iron sulfate

Ancestry of “copperas”, step by step

StepLanguageWordMeaning
1Middle EnglishcoperasA metallic sulfate
2Middle Englishcoperosemetallic sulfate
Every word from Middle English coperose →Every word from Middle English coperas →