iron sulfate

noun

1. ferrous sulfate.

Word History and Origins

Origin of iron sulfate¹

First recorded in 1875–80

Example Sentences

Both correspondents used common gall ink made from iron sulfate, but different inks contain different proportions of trace elements, depending on the source, Michelin says.

From Science News

Vitriol is copper or iron sulfate, saltpeter is potassium nitrate, and alum is an aluminum sulfate salt.

From Project Gutenberg