The present page holds the title of a primary topic, and an article needs to be written about it. It is believed to qualify as a broad-concept article. It may be written directly at this page or drafted elsewhere and then moved to this title. Related titles should be described in Coccoid, while unrelated titles should be moved to Coccoid (disambiguation).

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Coccoid means shaped like or resembling a coccus, that is, spherical.
The noun coccoid or coccoids may refer to:

• a level of organization, characterized by unicellular, non-flagellated, non-amoeboid organisms, with a definite shape, in general but not always ovoid. It is found in many groups, e.g.:
  • some bacteria, also called cocci (pl. of coccus)
  • some green algae, like the desmids and the former Chlorococcales (now in several orders within the division Chlorophyta)
  • some dinoflagellates, notably Symbiodinium
  • some chrysophytes
  • some xanthophytes
  • the diatoms
• the superfamily Coccoidea of scale insects
  • the Coccidae family within the Coccoidea

• Coccolite, a form of the mineral diopside
• Coccolithophore, a class of phytoplankton (alga)
• Coccolith, a platelet formed by coccolithophore, found in chalk

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