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ammonoid

/ˈæm.ə.nɔɪd/

1 entry

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.

  • 🇷🇺Существительное, обозначающее одну из спиральных, камерных ископаемых раковин вымерших морских моллюсков, часто встречающихся в осадочных породах.
  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.

    🇷🇺Вымерший морской моллюск

    Synonyms: ammonite

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