any anthozoan coelenterate of the subclass Alcyonaria, as corals and sea anemones, having the tentacles and other body parts in branches or segments of eight.
belonging or pertaining to the Alcyonaria.
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How to use alcyonarian in a sentence
In the alcyonarian forms belonging to this great group these tentacles are always eight in number, and fringed on both sides.Young Folks' Library, Volume XI (of 20) | Various
More interesting than the Annelids, however, are the alcyonarian Actinozoa.Young Folks' Library, Volume XI (of 20) | Various
Every alcyonarian colony is developed by budding from a single parent zooid.