Emily Dickinson Lexicon

SPEC'U-LAR, a. [L. specularis, from speculum, a mirror, from specio, to see.]

1. Having the qualities of a mirror or looking-glass; having a smooth reflecting surface; as, a specular metal; a specular surface. – Newton.
2. Assisting sight. [Improper and not used.] – Philips.
3. Affording view. – Milton.