actinomorphic

adjective

ac·​ti·​no·​mor·​phic ˌak-(ˌ)ti-nō-ˈmȯr-fik 

-tə-nō-;

ak-ˌti-nō-

: being radially symmetrical and capable of division by any longitudinal plane into essentially symmetrical halves

an actinomorphic tulip flower

actinomorphy

ˈak-tə-nō-ˌmȯr-fē 

ak-ˈti-nō-

noun

Word History

Etymology

German actinomorph (from actino- actino- + -morph, borrowed from Greek -morphos -morphous) + -ic entry 1

First Known Use

1881, in the meaning defined above