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Webster 1913 Edition
Pyrogallate
Pyrˊo-gal′late
,Noun.
 (Chem.) 
A salt of pyrogallic acid; an ether of pyrogallol. 
Definition 2025
pyrogallate
pyrogallate
English
Noun
pyrogallate (usually uncountable, plural pyrogallates)
- (chemistry) any salt of the phenol pyrogallol when viewed as an acid