Dictionary

radiolarian

noun ra·di·o·lar·i·an \ˌrā-dē-ō-ˈler-ē-ən\

Definition of RADIOLARIAN

:  any of three classes (Acantharia, Polycystina, and Phaeodaria) of usually spherical chiefly planktonic marine protozoans having radiating threadlike pseudopodia and often a siliceous skeleton of spicules
radiolarian adjective
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Illustration of RADIOLARIAN

First Known Use of RADIOLARIAN

1875

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