actiniform

[ ak-tin-uh-fawrm ]

/ ækˈtɪn əˌfɔrm /

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adjective Zoology.

having a radiate form.

QUIZ

THINGAMABOB OR THINGUMMY: CAN YOU DISTINGUISH BETWEEN THE US AND UK TERMS IN THIS QUIZ?

Do you know the difference between everyday US and UK terminology? Test yourself with this quiz on words that differ across the Atlantic.

Question 1 of 7

In the UK, COTTON CANDY is more commonly known as…

candystring

candyfloss

candypuff

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Origin of actiniform

First recorded in 1835–45; actin- + -i- + -form

Words nearby actiniform

actinian, actinic, actinic ray, actinide, actinide series, actiniform, actinin, actinism, actinium, actinium series, actino-

Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2023

How to use actiniform in a sentence

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

actiniform

/ (ækˈtɪnɪˌfɔːm) /

adjective

another word for actinoid

Word Origin for actiniform

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