plural noun
Ac·​tin·​i·​ar·​ia | \ ¦ak-ˌti-nē-¦a-rē-ə, -ˈer-ē-\

Definition of Actiniaria

: an order or suborder of Anthozoa (subclass Zoantharia) comprising the sea anemones which differ from the corals in forming no hard skeleton and in existing as separate individuals

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First Known Use of Actiniaria

1856, in the meaning defined above

History and Etymology for Actiniaria

borrowed from New Latin, from Actinia actinia + -aria -aria entry 2

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The first known use of Actiniaria was in 1856

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