or ac·tin·o·mor·phous

[ ak-tin-oh-mawr-fik, ak-tuh-noh- ]
/ ækˌtɪn oʊˈmɔr fɪk, ˌæk tə noʊ- /


Biology. having radial symmetry.
Botany. (of certain flowers, as the buttercup) divisible vertically into similar halves by each of a number of planes passing through the axis.

Origin of actinomorphic

First recorded in 1895–1900; actino- + -morphic

OTHER WORDS FROM actinomorphic

ac·tin·o·mor·phy, noun Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

British Dictionary definitions for actinomorphic



/ (ˌæktɪnəʊˈmɔːfɪk) /


botany (esp of a flower) having radial symmetry, as buttercupsSee also zygomorphic

Derived forms of actinomorphic

actinomorphy, noun
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

Science definitions for actinomorphic

[ ăk′tə-nō-môrfĭk ]

Relating to a flower that can be divided into equal halves along any diameter; radially symmetrical. The flowers of the rose and tulip are actinomorphic. Compare zygomorphic.
The American Heritage® Science Dictionary Copyright © 2011. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.