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单词 telolecithal
释义

Definition of telolecithal in English:

telolecithal

adjectiveˌtiːlə(ʊ)ˈlɛsɪθ(ə)lˌtɛlə(ʊ)ˈlɛsɪθ(ə)lˌtelōˈlesəTHəl
Zoology
  • (of an egg or egg cell) having a large yolk situated at or near one end.

    〔动〕端(卵)黄的

    Example sentencesExamples
    • Mammals have very little yolk but have evolved from reptiles with telolecithal eggs and, thus, they retain features to cope with the problem of a large inert yolk mass.
    • Maternal and paternal brooding roles are reversed in these groups, with females producing large telolecithal eggs that are fertilized as they are deposited into the male brood pouch.
    • Teleost eggs are telolecithal, with the yolk segregated from the active cytoplasm.

Origin

Late 19th century: from Greek telos 'end' + lekithos 'egg yolk' + -al.

Definition of telolecithal in US English:

telolecithal

adjectiveˌtelōˈlesəTHəl
Zoology
  • (of an egg or egg cell) having a large yolk situated at or near one end.

    〔动〕端(卵)黄的

    Example sentencesExamples
    • Maternal and paternal brooding roles are reversed in these groups, with females producing large telolecithal eggs that are fertilized as they are deposited into the male brood pouch.
    • Mammals have very little yolk but have evolved from reptiles with telolecithal eggs and, thus, they retain features to cope with the problem of a large inert yolk mass.
    • Teleost eggs are telolecithal, with the yolk segregated from the active cytoplasm.

Origin

Late 19th century: from Greek telos ‘end’ + lekithos ‘egg yolk’ + -al.

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更新时间:2024/12/27 17:07:36