trichite
Trich"ite, n. Etym: [Gr. 1. (Min.) Defn: A kind of crystallite resembling a bunch of hairs, common in obsidian. See Illust. of Crystallite. 2. (Zoöl.) Defn: A delicate, hairlike siliceous spicule, found in certain sponges. Trichite sheaf (Zoöl.), one of the small sheaflike fascicles of slender setæ characteristic of certain sponges. See Illust. under Spicule.