<zoology> A genus of hexactinelline sponges, having a long stem composed of very long, slender, transparent, siliceous fibres twisted together like the strands of a colour. The stem of the Japanese species (H. Sieboldii), called glass-rope, has long been in use as an ornament. See Glass-rope.

Origin: NL, fr. Gr. Glass + a thread.

(01 Mar 1998)