Spĕc'ū-lar, a.
a. [Lat. specularis, Fr. spéculaire, Pr. specular, Sp. especular, It. speculare. See SPECULUM.]
Sense 1. Having the qualities of a speculum or mirror; having a smooth, reflecting surface; as, a specular metal; a specular surface.
Sense 2. Assisting sight. [Obs.]
Thy specular orb Apply to well-directed kernels, lo! In each observe the slender threads Of first beginning trees. Philips.
Sense 3. Affording view. [Rare.] Milton.
Specular iron (Min.), an ore of iron occurring frequently in crystals of a brilliant metallic luster. Dana.