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green vitriol

American  
[green vi-tree-uhl] / ˈgrin ˈvɪ tri əl /

noun

  1. Chemistry. archaic term for ferrous sulfate.

green vitriol British  

noun

  1. another name for ferrous sulphate

"Collins English Dictionary — Complete & Unabridged" 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
green vitriol Scientific  

  1. See ferrous sulfate

Definitions and idiom definitions from Dictionary.com Unabridged, based on the Random House Unabridged Dictionary, © Random House, Inc. 2023

Idioms from The American Heritage® Idioms Dictionary copyright © 2002, 2001, 1995 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company.