Specular /(?)/

Spec·u·lar

Specular

a.
  1. Having the qualities of a speculum, or mirror; having a smooth, reflecting surface; as, a specular metal; a specular surface.
  2. Of or pertaining to a speculum; conducted with the aid of a speculum; as, a specular examination. (Med.)
  3. Assisting sight, as a lens or the like. [Obs.]
    Thy specular orb Apply to well-dissected kernels; lo! In each observe the slender threads Of first-beginning trees.
    — J. Philips.
  4. Affording view. [R.]

Phrases & Compounds
Specular iron
See Hematite.