Definition of coccolith in English:


Line breaks: cocco|lith
Pronunciation: /ˈkɒkəlɪθ


A minute rounded calcareous platelet, numbers of which form the spherical shells of coccolithophores.
More example sentences
  • 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 living cell possesses a gelatinous sheath in which are embedded calcareous plates termed coccoliths.


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

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