from the GNU version of the Collaborative International Dictionary of English
- n.pl. The grand division of the animal kingdom which includes the sponges; -- called also Spongida, Spongiaria, Spongiozoa, and Porifera.
from The Century Dictionary and Cyclopedia
- Sponges; the mesodermalian class of Cœlentera, having a branching canal-system (the organs of which are developed from cells of the mesogæa, or primary mesoderm), simple epithelia, endodermal collar-cells, and no cnidoblasts or movable appendages.
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