UK:*UK and possibly other pronunciationsUK and possibly other pronunciations/ˌæktɪnəʊˈmɔːfɪk/US:USA pronunciation: respellingUSA pronunciation: respelling(ak tin′ō môrfik, ak′tə nō-)

WordReference Random House Unabridged Dictionary of American English © 2020
ac•tin•o•mor•phic  (ak tin′ō môrfik, ak′tə nō-),USA pronunciation adj. 
  1. Biologyhaving radial symmetry.
  2. Botany(of certain flowers, as the buttercup) divisible vertically into similar halves by each of a number of planes passing through the axis.
Also,  ac•tin′o•morphous.  ac•tino•mor′phy, n. 
  • actino- + -morphic 1895–1900

Collins Concise English Dictionary © HarperCollins Publishers::
actinomorphic /ˌæktɪnəʊˈmɔːfɪk/, actinomorphous adj
  1. (esp of a flower) having radial symmetry, as buttercups
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