Definitions

from The Century Dictionary.

  • A group of the Porifera or Spongiœ, among which are representatives of the most primitive or fundamental type of poriferal structure; the Chalk-sponges.

from the GNU version of the Collaborative International Dictionary of English.

  • noun plural (Zoöl.) An order of marine sponges, containing calcareous spicules. See porifera.

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