The Collaborative International Dictionary of English v.0.48:

benzocaine \benzocaine\ n.
   a chemical substance obtainable as a white crystalline ester
   (H2N.C6H4.CO.O.C2H5) used as a local anesthetic.
   Chemically, it is 4-aminobenzoic acid ethyl ester.

   Syn: ethyl p-aminobenzoate.
        [WordNet 1.5]

WordNet (r) 3.0 (2006):

benzocaine
    n 1: a white crystalline ester used as a local anesthetic [syn:
         benzocaine, ethyl aminobenzoate]