Pȳr'i-to-hē'dron or Pȳr'i-toid, n.
n. [Gr. πυρίτης, εἶδος, form, and ἔδρα, base.] (Crystallog.) The pentagonal dodecahedron, a common form of pyrites. Dana.
n. [Gr. πυρίτης, εἶδος, form, and ἔδρα, base.] (Crystallog.) The pentagonal dodecahedron, a common form of pyrites. Dana.