The Collaborative International Dictionary of English v.0.48:

Bondwoman \Bond"wom`an\ (b[o^]nd"w[oo^]m`an), n.; pl.
   Bondwomen (-w[i^]m`en). [Bond,a.orn.+ woman.]
   A woman who is a slave, or in bondage.
   [1913 Webster]

         He who was of the bondwoman.             --Gal. iv. 23.
   [1913 Webster]

WordNet (r) 3.0 (2006):

bondwoman
    n 1: a female bound to serve without wages [syn: bondwoman,
         bondswoman, bondmaid]
    2: a female slave [syn: bondwoman, bondswoman, bondmaid]