oculus

A window or other opening that has an oval or circular shape (as of an eye).

Noun

  1. A window or other opening that has an oval or circular shape (as of an eye).

    1. The central boss of a volute.

    2. An opening at the apex of a dome.

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

Origin

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

Forms

oculi