glass sponge

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WordNet Dictionary

	Definition:	[n] a siliceous sponge (with glassy spicules) of the class Hyalospongiae

	See Also:	class Hyalospongiae, Hyalospongiae, parazoan, poriferan, sponge, Venus's flower basket

Webster's 1913 Dictionary

	Definition:	\Glass"-sponge`\, n. (Zo["o]l.) A siliceous sponge, of the genus {Hyalonema}, and allied genera; -- so called from their glassy fibers or spicules; -- called also {vitreous sponge}. See {Glass-rope}, and {Euplectella}.