Actiniaria
plural noun
Ac·tin·i·ar·ia
¦ak-ˌti-nē-¦a-rē-ə,
-ˈer-ē-
: 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
Word History
Etymology
borrowed from New Latin, from Actinia actinia + -aria -aria entry 2
First Known Use
1856, in the meaning defined above