ACTINAL
Ac"ti*nal, a. Etym: [Gr. (Zoöl.)
Defn: Pertaining to the part of a radiate animal which contains the mouth. L. Agassiz.
ACTINARIA
Ac`ti*na"ri*a, n. pl. Etym: [NL., from Gr. (Zoöl.)
Defn: A large division of Anthozoa, including those which have simple tentacles and do not form stony corals. Sometimes, in a wider sense, applied to all the Anthozoa, expert the Alcyonaria, whether forming corals or not.
ACTING
Act"ing, a.
1. Operating in any way.
2. Doing duty for another; officiating; as, an superintendent.
ACTINIA 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.
ACTINIC
Ac*tin"ic, a.
Defn: Of or pertaining to actinism; as, actinic rays.