from the GNU version of the Collaborative International Dictionary of English

  • An order of Anthozoa; the Actinaria.

from The Century Dictionary and Cyclopedia

  • An order or some similar group of malacodermatous or soft-bodied anthozoan or zoantharian polyps, of the class Actinozoa; the sea-anemones, in a broad sense, represented by the Actiniidæ and related families. Groups more or less exactly synonymous are Actiniaria, Hexacoralla, and Malacodermata. Also Helianthoida.


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