Hyalonema \Hy`a*lo*ne"ma\, n. [NL., fr. Gr. "y`alos glass + ? a
thread.] (Zool.)
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}.
[1913 Webster]