Trichite /(?)/

Trich·ite

Trichite

n.
  1. A kind of crystallite resembling a bunch of hairs, common in obsidian. See Illust. of Crystallite. (Min.)
  2. A delicate, hairlike siliceous spicule, found in certain sponges. (Zool.)

Phrases & Compounds
Trichite sheaf
one of the small sheaflike fascicles of slender setae characteristic of certain sponges. See Illust. under Spicule.