The Collaborative International Dictionary of English v.0.48:

Edentulous \E*den"tu*lous\ ([-e]*d[e^]n"t[-u]*l[u^]s; 135), a.
   [L. edentulus; e out + dens, dentis, tooth.]
   Toothless.
   [1913 Webster]

WordNet (r) 3.0 (2006):

edentulous
    adj 1: having lost teeth