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actinoid

[ak-tuh-noid]
See more synonyms for actinoid on Thesaurus.com
adjective
  1. raylike; radiate.
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Origin of actinoid

First recorded in 1840–50; actin- + -oid
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

Examples from the Web for actinoid

Historical Examples

  • Of the lowest among these orders, the Actinoid Polyps, our Actinia or sea-anemone is a good example.

    Seaside Studies in Natural History

    Elizabeth Cabot Cary Agassiz


British Dictionary definitions for actinoid

actinoid

adjective
  1. having a radiate form, as a sea anemone or starfish
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Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012