Definition of nitrate noun from the Oxford Advanced Learner's Dictionary

 

nitrate

 noun
noun
BrE BrE//ˈnaɪtreɪt//
 
; NAmE NAmE//ˈnaɪtreɪt//
 
[uncountable, countable](chemistry) Growing crops
 
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a compound containing nitrogen and oxygen. There are several different nitrates and they are used especially to make soil better for growing crops. We need to cut nitrate levels in water. See related entries: Growing crops Word Origin late 18th cent.: from French (from nitre, from Latin nitrum, from Greek nitron + -ate).
See the Oxford Advanced American Dictionary entry: nitrate