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n :  any of a linear series of primitively similar segments into which the body of a higher invertebrate or vertebrate is divisible and which are usu. clearly distinguishable in the embryo, identifiable in somewhat modified form in various invertebrates (as annelid worms), and detectable in the adult higher vertebrate only in specialized segmentally arranged structures (as cranial and spinal nerves or vertebrae)  :  SOMITE .
Similar sounding terms:  meta·mer 

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North Big Horn Hospital District (Lovell, Wyoming - Big Horn County)