actinian

[ ak-tin-ee-uhn ]

/ ækˈtɪn i ən /

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adjective

belonging or pertaining to the order or suborder Actiniaria, comprising the sea anemones.

noun

any sea anemone.

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Question 1 of 6

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Origin of actinian

1885–90; <New Latin Actini(a) actinia + -an

Moreover, there are some modern corals in which the secondary cycle of mesenteries departs from the Actinian plan.
Encyclopaedia Britannica, 11th Edition, Volume 2, Slice 2|Various