(1):

(a.) Affording view.

(2):

(a.) Of or pertaining to a speculum; conducted with the aid of a speculum; as, a specular examination.

(3):

(a.) Assisting sight, as a lens or the like.

(4):

(a.) Having the qualities of a speculum, or mirror; having a smooth, reflecting surface; as, a specular metal; a specular surface.