'Zoanthacea' definitions:
Definition of 'Zoanthacea'
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Zoanthacea \Zo`an*tha"ce*a\, n. pl. [NL., from Gr. zw^,on an
animal + ? flower.] (Zool.)
A suborder of Actinaria, including Zoanthus and allied
genera, which are permanently attached by their bases.
[1913 Webster]