Source : Webster's Revised Unabridged Dictionary (1913)

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