The Collaborative International Dictionary of English v.0.48:

Craw \Craw\ (kr[add]), n. [Akin to D. kraag neck, collar, G.
   kragen, Sw. kr[aum]fva craw, Dan. kro, and possibly to Gr.
   ???? (E. bronchus), or bro`chqos throat. [root]25. Cf. Crag
   neck.] (Zool.)
   (a) The crop of a bird.
   (b) The stomach of an animal.
       [1913 Webster] crawdad

WordNet (r) 3.0 (2006):

craw
    n 1: a pouch in many birds and some lower animals that resembles
         a stomach for storage and preliminary maceration of food
         [syn: craw, crop]