The Collaborative International Dictionary of English v.0.48:

Croquette \Cro*quette"\ (kr?-k?t"), n. [F., fr. croquer to
   crunch.] (Cookery)
   A ball of minced meat, fowl, rice, vegetables, or other
   ingredients, often in a thick white sauce, highly seasoned,
   breaded, and fried; as, a dish of crab croquettes.
   [1913 Webster +PJC]

WordNet (r) 3.0 (2006):

croquette
    n 1: minced cooked meats (or vegetables) in thick white sauce;
         breaded and deep-fried