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单词 somite
释义

Definition of somite in English:

somite

noun ˈsəʊmʌɪtˈsōmīt
Zoology
  • Each of a number of body segments containing the same internal structures, clearly visible in invertebrates such as earthworms but also present in the embryonic stages of vertebrates.

    Also called metamere
    Example sentencesExamples
    • The trunk section, the perion, consists of the remainder of the typical thoracic somites.
    • If male abdomina are preserved, the fusion of the somites is also diagnostic; pseudoziids exhibit no fusion of somites while carpiliids have somites 3-5 fused.
    • The neural tube of the body tends to segment in an orderly way along the boundaries between somites.
    • The basis for the confusion arises from the visible suture between somites 4 and 5, which suggests that the fusion is not complete.
    • This takes the vertebrate embryo up to the stage at which it has become recognizably vertebrate, with somites, notochord, and neural tube.

Origin

Mid 19th century: from Greek sōma 'body' + -ite1.

 
 

Definition of somite in US English:

somite

nounˈsōmīt
Zoology
  • Each of a number of body segments containing the same internal structures, clearly visible in invertebrates such as earthworms but also present in the embryonic stages of vertebrates.

    Also called metamere
    Example sentencesExamples
    • This takes the vertebrate embryo up to the stage at which it has become recognizably vertebrate, with somites, notochord, and neural tube.
    • The trunk section, the perion, consists of the remainder of the typical thoracic somites.
    • If male abdomina are preserved, the fusion of the somites is also diagnostic; pseudoziids exhibit no fusion of somites while carpiliids have somites 3-5 fused.
    • The basis for the confusion arises from the visible suture between somites 4 and 5, which suggests that the fusion is not complete.
    • The neural tube of the body tends to segment in an orderly way along the boundaries between somites.

Origin

Mid 19th century: from Greek sōma ‘body’ + -ite.

 
 
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更新时间:2024/12/24 21:34:06