glass-rope

Century Dictionary and Cyclopedia

1. n. The stem of a glass-sponge, as Hyalonema.

Wiktionary

1. n. A vitreous sponge of the genus Hyalonema, with a long stem, consisting of a bundle of long glassy siliceous fibres twisted together.

GNU Webster's 1913

1. n. (Zoöl.) A remarkable vitreous sponge, of the genus Hyalonema, first brought from Japan. It has a long stem, consisting of a bundle of long and large, glassy, siliceous fibers, twisted together.