Webster's Revised Unabridged Dictionary · 1913

Actinia

Actinia ({not transcribed}) , noun

[Latinized from Greek {not transcribed}, {not transcribed}, ray.]

(a)
(Zoology) An animal of the class Anthozoa, and family Actinida. From a resemblance to flowers in form and color, they are often called animal flowers and sea anemones. [See Polyp.].
(b)
(Zoology) A genus in the family Actinida.