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]

Moby Thesaurus II by Grady Ward, 1.0:

37 Moby Thesaurus words for "craw":
   abdomen, abomasum, bay window, beerbelly, belly, breadbasket, crop,
   diaphragm, embonpoint, first stomach, gizzard, gullet, gut,
   honeycomb stomach, kishkes, manyplies, maw, midriff, omasum,
   paunch, pot, potbelly, potgut, psalterium, pusgut, rennet bag,
   reticulum, rumen, second stomach, spare tire, stomach, swagbelly,
   third stomach, tum-tum, tummy, underbelly, ventripotence