Vitreous sponge

See Glass-sponge.
(Zool.) any one of numerous species of siliceous sponges having, often fibrous, glassy spicules which are normally six-rayed; a hexactinellid sponge. See Venus's basket, under Venus.

See also: Sponge, Vitreous

Webster's Revised Unabridged Dictionary, published 1913 by G. & C. Merriam Co.
References in periodicals archive ?
Vitreous sponges of the Northern and Far-Eastern Seas of the USSR.