Source : Webster's Revised Unabridged Dictionary (1913)

Metamere \Met"a*mere\, n. [Pref. meta- + -mere.] (Biol.)
   One of successive or homodynamous parts in animals and
   plants; one of a series of similar parts that follow one
   another in a vertebrate or articulate animal, as in an
   earthworm; a segment; a somite. See Illust. of {Loeven's
   larva}.

Source : WordNet®

metamere
     n : one of a series of similar body segments into which some
         animals are divided longitudinally [syn: {somite}]