• (n.) 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.
any of a class (Hexactinellida, also called Hyalospongiae, or Triaxonia) of sponges characterized by a skeleton that consists of silica spicules ... [1 related articles]
Glass'-sponge` noun (Zoology) 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 . 
[n] - a siliceous sponge (with glassy spicules) of the class Hyalospongiae
noun a siliceous sponge (with glassy spicules) of the class Hyalospongiae