antimony potassium tartrate

English Thesaurus

1. a poisonous colorless salt used as a mordant and in medicine (noun.substance)

hypernym	:	mordant,
definition	:	a substance used to treat leather or other materials before dyeing; aids in dyeing process (noun.substance)

hypernym	:	tartrate,
definition	:	a salt or ester of tartaric acid (noun.substance)