Oculus

//ˈɒk.jʊ.ləs// noun

Definitions

Noun
  1. 1
    A window or other opening that has an oval or circular shape (as of an eye).; The central boss of a volute.
  2. 2
    the organ of sight wordnet
  3. 3
    A window or other opening that has an oval or circular shape (as of an eye).; An opening at the apex of a dome.

    "One can glimpse the sky through the oculus of the Pantheon in Rome."

Etymology

Learned borrowing from Latin oculus (“eye”). Doublet of occhio.

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