Definition of sulfate
(Entry 1 of 2)
1
: a salt or ester of sulfuric acid
2
: a divalent group or anion SO4 characteristic of sulfuric acid and the sulfates
sulfate
verb
sulfated; sulfating
Definition of sulfate (Entry 2 of 2)
: to treat or combine with sulfuric acid or a sulfate
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Merriam-Webster unabridged
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Time Traveler for sulfate
The first known use of sulfate was in 1788
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