glass-sponge

from The Century Dictionary.

• noun A species of silicious sponge, Hyalonema sieboldi, found in Japan.

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

• noun (Zoöl.) 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.

from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.

• noun a siliceous sponge (with glassy spicules) of the class Hyalospongiae