somite(n = noun.animal) metamere - one of a series of similar body segments into which some animals are divided longitudinally;
is a kind of segment

   One of the actual or ideal serial segments of which an animal, esp. an articulate or vertebrate, is composed; somatome; metamere. [1913 Webster]

somite, n. each body-division of a metamerically segmented animal.

Derivative:
somitic adj.

Etymology:
Gk soma body + -ITE(1)