• WordNet 3.6
    • n Alcyonaria corals and sea anemones having eight branches
    • ***
Webster's Revised Unabridged Dictionary
    • prop. n. pl Alcyonaria acr/l`sĭ*ŏ*nā"rĭ*ȧ (Zoöl) One of the orders of Anthozoa. It includes the Alcyonacea, Pennatulacea, and Gorgonacea.
    • ***
Century Dictionary and Cyclopedia
    • Alcyonaria An order of actinozoan corals, or, as some hold, a subclass of coralligenous Actinozoa, distinguished in this use from Zoantharia, the other subclass of Actinozoa (which contains the sea-anemones, etc.), by having pinnately fringed instead of simple tentacles, arranged around the mouth like the rays of a starfish, whence the alternative name Asteroida. The tentacles of Alcyonaria are in one series of 8, instead of 6 or a multiple of 6, whence the alternative name Octocoralla, the sea-anemones being known as Hexacoralla. For the same reason, the Alcyonaria are also termed Octactiniæ. The corallum, when present, is external, spicular, or with a sclerobasic axis, but occasionally thecal or tubular. The polyps are connected by the cœnosare, through which permeate prolongations of the body-cavity of each, thus permitting a free circulation of fluids. There is sometimes an outer skeleton, either with or without a central sclerobasic axis. The corallum is rarely thecal, never presenting traces of septa.
    • Alcyonaria A subclass of Anthozoa, containing the orders Stolonifera, Alcyonacea, Pseudaxonia, Axifera, Stelechotokea, and Cœnothecalia.
    • ***


Webster's Revised Unabridged Dictionary


In literature:

These are the ALCYONARIA and the ZOANTHARIA.
"Encyclopaedia Britannica, 11th Edition, Volume 2, Slice 2" by Various