The Collaborative International Dictionary of English v.0.48:

Saleswoman \Sales"wom`an\, n.; pl. Saleswomen.
   A woman whose occupation is to sell goods or merchandise.
   [1913 Webster]

WordNet (r) 3.0 (2006):

saleswoman
    n 1: a woman salesperson [syn: salesgirl, saleswoman,
         saleslady]