GNU Collaborative International Dictionary of English

Found one definition

1.       
   Nitrate (?), n. [Cf. F. nitrate.] (Chem.) A salt of nitric acid.
   
   [1913 Webster]
   
   Nitrate of silver, a white crystalline salt (AgNO3), used in photography and as a cauterizing agent; -- called also lunar caustic, and more commonly called silver nitrate.
   
   [1913 Webster +PJC]