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See more synonyms for actiniform on Thesaurus.com
adjective Zoology.
  1. having a radiate form.
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Origin of actiniform

First recorded in 1835–45; actin- + -i- + -form
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

Examples from the Web for actiniform

Historical Examples

  • The animals are actiniform, furnished with numerous cleft tentacula, in the centre of which is the polygonal mouth.

    The Ocean World:

    Louis Figuier

British Dictionary definitions for actiniform


  1. another word for actinoid
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Word Origin

C20: from actino- + -form
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