1) Segment 2) Somite 1) Somite 
• (n.) 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.
<biology> Unit of segmentation or metamerism. ... (18 Nov 1997) ... 
(met´ә-mēr) one of a series of homologous segments of the body of an animal. Cf. antimere.
One of the segments in a metameric animal.Unit of segmentation or metamerism.
Met'a·mere noun [ Prefix 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'...
Type: Term Pronunciation: met′ă-mēr Definitions: 1. One of a series of homologous segments in the body.
[n] - one of a series of similar body segments into which some animals are divided longitudinally
somite noun one of a series of similar body segments into which some animals are divided longitudinally