What is "uropod"

Uropod \U"ro*pod\, n. [2d uro- + -pod.] (Zo["o]l.) Any one of the abdominal appendages of a crustacean, especially one of the posterior ones, which are often larger than the rest, and different in structure, and are used chiefly in locomotion. See Illust. of Crustacea, and Stomapoda.

n. 1 (context anatomy English) either of the two posterior abdominal appendages of the lobster, shrimp and some other crustaceans 2 (context immunology English) the hind part of polarized leukocytes, mostly involved in cell-to-cell interaction, cell activation and apoptosis

Uropods, in immunology, refer to the hind part of polarized leukocytes, mostly involved in cell-to-cell interaction, cell activation and apoptosis. Leukocyte polarization is an important requirement for migration, activation and apoptosis.