Glass-sponge
Pronunciation : Glass"-sponge`
Part of Speech : n.
Definition : Defn: 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.
(Zo?l.)
Source : Webster's Unabridged Dictionary, 1913