ACTINIA
actinia, actinian, actiniarian
(noun) any sea anemone or related animal
Actinia, genus Actinia
(noun) a genus of sea anemone common in rock pools
Source: WordNet® 3.1
Etymology
From the genus name.
Noun
actinia (plural actinias or actiniae)
a sea anemone, a member of the genus Actinia.
Source: Wiktionary
Ac*tin"i*a, n.; pl. L. Actiniæ, E. Actinias. Etym: [Latinized fr. Gr.
(Zoöl.)
(a) An animal of the class Anthozoa, and family Actinidæ. From a
resemblance to flowers in form and color, they are often called
animal flowers and sea anemones. [See Polyp.].
(b) A genus in the family Actinidæ.
Source: Webster’s Unabridged Dictionary 1913 Edition