Meaning of oculus in English:

oculus

Pronunciation /ˈɒkjʊləs/

nounplural noun oculi/ˈɒkjʊlʌɪ/ /ˈɒkjʊliː/

Architecture
  • A round or eye-like opening or design, such as a circular window or an opening at the apex of a dome.

    ‘Either way, feeding a signal from a microphone placed in the oculus gives a real audio picture of the size of the space.’
    • ‘What could have swayed Capponi away from the plan for an oculus and toward the tall, narrow shape employed by Marcillat?’
    • ‘Vents in the facade, the cupolas, and the oculi inside allowed air to circulate throughout the building.’
    • ‘Each of the upper study areas has an oculus in the floor revealing its counterpart below.’

Origin

Early 18th century (in rare obsolete sense ‘leaf bud’): from Latin, literally ‘eye’.