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ammonoid

/ˈæm.ə.nɔɪd/

翻译: 指已灭绝的海生软体动物菊石类,其化石具有螺旋状、分室的钙质外壳,常见于沉积岩中。

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noun

C2formalcommonscientific/ˈæm.ə.nɔɪd/

A noun referring to one of the coiled, chambered fossil shells of extinct marine mollusks, often found in sedimentary rock.

  • 🇨🇳指已灭绝的海生软体动物菊石类,其化石具有螺旋状、分室的钙质外壳,常见于沉积岩中。
  1. Extinct marine mollusk C1 formal scientific

    An extinct group of marine mollusks with a coiled, chambered shell, related to modern squid and octopuses.

    • The fossil collector found a perfectly preserved ammonoid in the limestone quarry.
    • Ammonoids are important index fossils for dating rock layers.
    • The spiral shape of the ammonoid shell is a classic example of logarithmic growth.

    🇨🇳菊石

    同义词: ammonite

  • ammonoids plural form
  • ammonoids' possessive plural form
  • ammonoid's possessive singular form