Definition of radiolarian in English:

radiolarian

Line breaks: radio|lar¦ian
Pronunciation: /ˌreɪdɪə(ʊ)ˈlɛːrɪən
 
/
Zoology

noun

A single-celled aquatic animal which has a spherical amoeba-like body with a spiny skeleton of silica. Their skeletons can accumulate as a slimy deposit on the seabed.
  • Three classes of the phylum Actinopoda, kingdom Protista (formerly subclass or order Radiolaria)
More example sentences
  • Like other radiolarians, Acantharea have an elaborate mineralized skeleton.
  • Won regarded the hollow canal structure as one of the indicators of the close relationship of radiolarians and the Porifera.
  • Therefore, in terms of geological age determined by radiolarians and the ammonoid, this brachiopod fauna should be assigned to the latest Changhsingian.

adjective

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Relating to or formed from radiolarians: radiolarian ooze
More example sentences
  • Calcareous oozes are common in the low and mid-latitudes while in other places, particularly the high latitudes, radiolarian oozes tend to dominate.
  • Twenty-two samples for radiolarian research were collected from the grayish black, thin-bedded limestone and siliceous limestone of the Baoqing Member and the Mcishan Member.
  • Well-preserved Late Cambrian radiolarian faunas were recovered from carbonate rocks of the Cow Head Group of the Great Northern Peninsula of the island of Newfoundland, Canada.

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