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单词 heterocercal
释义

Definition of heterocercal in English:

heterocercal

adjective ˌhɛtərəʊˈsəːkəlˌhedərōˈsərk(ə)l
Zoology
  • (of a fish's tail) having unequal upper and lower lobes, usually with the vertebral column passing into the upper.

    〔动〕(鱼)歪尾鳍的。Contrasted withDIPHYCERCAL , HOMOCERCAL . 与DIPHYCERCAL , HOMOCERCAL 相对

    Contrasted with diphycercal, homocercal
    Example sentencesExamples
    • The body shows well-developed paired lateral fins (presumably true pectoral fins), indicating good stability, dorsal and anal fins, and a heterocercal tail (the lower lobe of the tail is elongated).
    • The tail is heterocercal, with the upper lobe containing long, thread-like filaments.
    • While the classical view of shark tail function was corroborated by the three-dimensional kinematic study of leopard sharks, the pattern of heterocercal tail function in sturgeon proved to be quite different.
    • The sturgeon heterocercal tail is extremely flexible and the upper tail lobe trails the lower during the fin beat cycle.
    • They also have a cartilaginous skeleton, heterocercal tail, and lack scales.

Origin

Mid 19th century: from hetero- 'other' + Greek kerkos 'tail'.

Definition of heterocercal in US English:

heterocercal

adjectiveˌhedərōˈsərk(ə)l
Zoology
  • (of a fish's tail) having unequal upper and lower lobes, usually with the vertebral column passing into the upper.

    〔动〕(鱼)歪尾鳍的。Contrasted withDIPHYCERCAL , HOMOCERCAL . 与DIPHYCERCAL , HOMOCERCAL 相对

    Contrasted with diphycercal, homocercal
    Example sentencesExamples
    • While the classical view of shark tail function was corroborated by the three-dimensional kinematic study of leopard sharks, the pattern of heterocercal tail function in sturgeon proved to be quite different.
    • The tail is heterocercal, with the upper lobe containing long, thread-like filaments.
    • The sturgeon heterocercal tail is extremely flexible and the upper tail lobe trails the lower during the fin beat cycle.
    • They also have a cartilaginous skeleton, heterocercal tail, and lack scales.
    • The body shows well-developed paired lateral fins (presumably true pectoral fins), indicating good stability, dorsal and anal fins, and a heterocercal tail (the lower lobe of the tail is elongated).

Origin

Mid 19th century: from hetero- ‘other’ + Greek kerkos ‘tail’.

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更新时间:2025/7/4 0:47:35