Source : Webster's Revised Unabridged Dictionary (1913)

Trichite \Trich"ite\, n. [Gr. ?, ?, hair.]
   1. (Min.) A kind of crystallite resembling a bunch of hairs,
      common in obsidian. See Illust. of {Crystallite}.

   2. (Zo["o]l.) A delicate, hairlike siliceous spicule, found
      in certain sponges.

   {Trichite sheaf} (Zo["o]l.), one of the small sheaflike
      fascicles of slender set[ae] characteristic of certain
      sponges. See Illust. under {Spicule}.