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词汇 coccolith
释义

Definition of coccolith in English:

coccolith

noun ˈkɒkəlɪθˈkäkəˌliTH
Biology
  • A minute rounded calcareous platelet, numbers of which form the spherical shells of coccolithophores.

    〔生〕球石(粒)

    Example sentencesExamples
    • The living cell possesses a gelatinous sheath in which are embedded calcareous plates termed coccoliths.
    • Like the rest of the world's seas, the Sargasso Sea has a population of the subsurface algae called coccoliths as well as planktonic foraminifera.
    • At this rate it is possible to produce an average 100 metre thickness of coccoliths as calcareous ooze on the ocean floor in less than 200 years.
    • Chalk, though it may include shell fragments, is predominantly composed of coccoliths from planktonic algae, forming fine-grained limestone.
    • The team did not limit themselves to foraminifera but used other planktonic groups such as the coccoliths and radiolaria.

Origin

Mid 19th century: from Greek kokkos 'grain or berry' + lithos 'stone'.

Definition of coccolith in US English:

coccolith

nounˈkäkəˌliTH
Biology
  • A minute rounded calcareous platelet, numbers of which form the spherical shells of coccolithophores.

    〔生〕球石(粒)

    Example sentencesExamples
    • Chalk, though it may include shell fragments, is predominantly composed of coccoliths from planktonic algae, forming fine-grained limestone.
    • Like the rest of the world's seas, the Sargasso Sea has a population of the subsurface algae called coccoliths as well as planktonic foraminifera.
    • The team did not limit themselves to foraminifera but used other planktonic groups such as the coccoliths and radiolaria.
    • At this rate it is possible to produce an average 100 metre thickness of coccoliths as calcareous ooze on the ocean floor in less than 200 years.
    • The living cell possesses a gelatinous sheath in which are embedded calcareous plates termed coccoliths.

Origin

Mid 19th century: from Greek kokkos ‘grain or berry’ + lithos ‘stone’.

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