somite(redirected from Primitive segments)
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1. Any of the homologous segments that compose the body of certain animals, such as earthworms and lobsters, and are arranged in a longitudinal series.
2. A segmental mass of mesoderm in the vertebrate embryo, occurring in pairs along the notochord and developing into muscles and vertebrae.
[Greek sōma, body; see soma1 + -ite.]
so·mit′ic (sō-mĭt′ĭk) adj.
1. (Zoology) embryol any of a series of dorsal paired segments of mesoderm occurring along the notochord in vertebrate embryos. It develops into muscle and bone in the adult animal
2. (Zoology) zoology another name for metamere
[C19: from Greek sōma a body]
somital, somitic adj
1. any of the longitudinal series of segments or parts into which the body of certain animals is divided; a metamere.
2. one of the thickened segments of tissue that occur in pairs along the back of the vertebrate embryo.
[1865–70; < Greek sôm(a) body]