The Collaborative International Dictionary of English v.0.48:

Benzoate \Ben"zo*ate\, n. [Cf. F. benzoate.] (Chem.)
   A salt formed by the union of benzoic acid with any
   salifiable base.
   [1913 Webster]

WordNet (r) 3.0 (2006):

benzoate
    n 1: any salt or ester of benzoic acid