Specular

a.
  1. Having the qualities of a speculum, or mirror; having a smooth, reflecting surface; as, a specular metal; a specular surface.
  2. (Med.) Of or pertaining to a speculum; conducted with the aid of a speculum; as, a specular examination.
  3. Assisting sight, as a lens or the like.
  4. Affording view.
  5. Specular iron . (Min.)
    See Hematite.