• (British) IPA: /ˈspɛkjʊlə/

specular

1. Pertaining to mirrors; mirror-like, reflective. [from 17th c.]
   • 1969, Vladimir Nabokov, Ada or Ardor, Penguin 2011, p. 14:

     a perfect likeness would rather suggest a specular, and hence speculatory, phenomenon [...].

2. (medicine) Of or relating to a speculum; conducted with the aid of a speculum.

   a specular examination

3. Assisting sight, like a lens etc.

   • Thy specular orb / Apply to well-dissected kernels; lo! / In each observe the slender threads / Of first-beginning trees.

4. (poetic) Offering an expansive view; picturesque.
   • 1833, William Wordsworth, Hope Smiled:

     Calm as the Universe, from specular towers / Of heaven contemplated by Spirits pure.

   • 1671, John Milton, “Book the Fourth”, in Paradise Regain’d. A Poem. In IV Books. To which is Added, Samson Agonistes, London: Printed by J. M[acock] for John Starkey […], OCLC 228732398 ↗:

     Look once more, e're we leave this specular mount.