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Keratose :: Keratose (a.) Containing hornlike fibers or fibers of keratose; belonging to the Keratosa.

Keratosa :: Keratosa (n. pl.) An order of sponges having a skeleton composed of hornlike fibers. It includes the commercial sponges.

Sponge :: Sponge (n.) The elastic fibrous skeleton of many species of horny Spongiae (keratosa), used for many purposes, especially the varieties of the genus Spongia. The most valuable sponges are found in the Mediterranean and the Red Sea, and on the coasts of Florida and the West Indies..

Porifera :: Porifera (n. pl.) A grand division of the Invertebrata, including the sponges; -- called also Spongiae, Spongida, and Spongiozoa. The principal divisions are Calcispongiae, Keratosa or Fibrospongiae, and Silicea..

Keratoidea :: Keratoidea (n. pl.) Same as Keratosa.

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