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radiolaria Syllabification: ra·di·o·lar·i·a
Pronunciation: /ˌrādēəˈlerēə/

Definition of radiolaria in English:

plural noun

Radiolarians collectively.
Example sentences
  • Fewer than 250,000 fossils - most are ‘large microbes,’: foraminifera, radiolaria, coccolithophores or diatoms - are named in the paleontological literature.
  • As in other radiolaria, Acantharea have a gelatinous ectoplasm filled with vacuoles, separated from the inner cell mass by a fibrous capsular wall.
  • The marine biostratigraphy is based upon microfaunas and floras, notably planktonic foraminifera and radiolaria.


Late 19th century: modern Latin (former order name), from late Latin radiolus 'faint ray', diminutive of radius 'ray'.

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