hyalonema

from The Century Dictionary.

• noun The typical genus of the family Hyalonemidæ.

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

• noun (Zoöl.) A genus of hexactinelline sponges, having a long stem composed of very long, slender, transparent, siliceous fibres twisted together like the strands of a color. The stem of the Japanese species (Hyalonema Sieboldii), called glass-rope, has long been in use as an ornament. See glass-rope.