Standard Lemma guide

oculus

noun · 3 senses · updated from the 2026-07-25 local source snapshot

Definitions and examples are grouped by meaning. Pronunciation, history, word forms, translations, descendants, synonyms, antonyms, derived terms, and related words appear whenever the source provides them.

Sound

Pronunciation

Each Play button uses your device's default local English voice, or a natural local fallback. The selected voice name appears after playback. This is synthesized speech, not a source recording.

  • Received-Pronunciation: /ˈɒk.jʊ.ləs/
  • General-American: /ˈɑk.jə.ləs/
  • General-American: Recorded audio is listed in the source snapshot.
  • rhymes with -ɒkjʊləs

1

noun

Meaning 1

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

The central boss of a volute.

Definition source: English Wiktionary via Wiktextract

Topics: architecture

No example sentence was provided for this meaning.

Meaning relationships

Synonyms: none provided

Antonyms: none provided

2

noun

Meaning 2

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

An opening at the apex of a dome.

Definition source: English Wiktionary via Wiktextract

Topics: architecture

Examples

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

Meaning relationships

Synonyms: none provided

Antonyms: none provided

3

noun

Meaning 3

the organ of sight

Definition source: Princeton WordNet 3.0

No example sentence was provided for this meaning.

Meaning relationships

Synonyms: eye, optic

Antonyms: none provided

Broader terms: sense organ, sensory receptor, receptor

Narrower terms: naked eye, peeper, oculus dexter, OD, oculus sinister, OS, simple eye, stemma, ocellus, compound eye

History

Etymology

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

Across languages

Translations

15 source translations are retained for this English entry.

  • Bulgarian: кръгъл прозорец (krǎgǎl prozorec) — circular window or opening
  • Catalan: ull de bou — circular window or opening
  • Catalan: òcul — circular window or opening
  • French: œil-de-bœuf — circular window or opening
  • German: Oculus — circular window or opening
  • German: Ochsenauge — circular window or opening
  • German: Rundfenster — circular window or opening
  • Hebrew: אוֹקוּלוּס (okulus) — circular window or opening
  • Italian: opaion — circular window or opening
  • Japanese: 目 (me) — circular window or opening
  • Japanese: 眼 (me) — circular window or opening
  • Polish: oculus — circular window or opening
  • Spanish: óculo — circular window or opening
  • Swedish: oculus — circular window or opening
  • Swedish: oxöga — circular window or opening
Real reading context

oculus in complete knowledge articles