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单词 pentadactyl
释义

Definition of pentadactyl in English:

pentadactyl

adjective ˌpɛntəˈdaktɪlˌpɛn(t)əˈdæktl
Zoology
  • (of a vertebrate limb) having five toes or fingers, or derived from such a form, as characteristic of all tetrapods.

    Example sentencesExamples
    • No single mutation can produce a pentadactyl limb of vertebrate type on a Drosophila.
    • These morphological facts show that the pentadactyl limb arose after the fin-limb transition and is the product of the canalization of the phenotype of the archaic limbs.
    • The pentadactyl pattern is a repeated design because it was available.
    • Others include pentadactyl feet and presence of a clavicle.
    • First, it's quite easy to ‘imagine’ a vertebrate without the pentadactyl pattern.

Derivatives

  • pentadactyly

  • noun ˌpɛntəˈdaktɪli
    Zoology
    • He pointed out, for example, that the developmental genetic explanation of the prevalence of pentadactyly assumes tetrapod monophyly.
      Example sentencesExamples
      • This was a very surprising discovery because pentadactyly had been assumed to be the normal condition in ‘early’ tetrapods.

Origin

Early 19th century: from penta- 'five' + Greek daktulos 'finger'.

 
 

Definition of pentadactyl in US English:

pentadactyl

adjectiveˌpen(t)əˈdaktlˌpɛn(t)əˈdæktl
Zoology
  • (of a vertebrate limb) having five toes or fingers, or derived from such a form, as characteristic of all tetrapods.

    Example sentencesExamples
    • These morphological facts show that the pentadactyl limb arose after the fin-limb transition and is the product of the canalization of the phenotype of the archaic limbs.
    • No single mutation can produce a pentadactyl limb of vertebrate type on a Drosophila.
    • Others include pentadactyl feet and presence of a clavicle.
    • First, it's quite easy to ‘imagine’ a vertebrate without the pentadactyl pattern.
    • The pentadactyl pattern is a repeated design because it was available.

Origin

Early 19th century: from penta- ‘five’ + Greek daktulos ‘finger’.

 
 
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更新时间:2024/12/23 8:23:33