the GNU version of the Collaborative International Dictionary of English
noun-plural. A grand division of the Invertebrata, including the sponges; -- called also Spongiæ, Spongida, and Spongiozoa. The principal divisions are Calcispongiæ, Keratosa or Fibrospongiæ, and Silicea.
The Century Dictionary and Cyclopedia
n. The sponges as a prime division of cœlenterates, or superclass of Cœlentera, having a system of pores or incurrent and excurrent openings, but no stinging-organs: contrasted with Nematophora, and more fully called Cœlentera porifera.
n. Same as Foraminifera.
WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
n. coextensive with the subkingdom Parazoa: sponges
Word Usage
"What startled the scientists the most was the discovery of the Ctenopelta porifera species."