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Webster 1913 Edition
Actinaria
‖
Acˊti-na′ri-a
,Noun.
pl.
[NL., from Gr. [GREEK], [GREEK], ray.]
(Zool.)
An order 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.