Standard Lemma guide

opalescence

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.

  • Australian: /ˌəʉpəˈlesəns/
  • US: Recorded audio is listed in the source snapshot.

1

noun

Meaning 1

the state of being opalescent

Definition source: English Wiktionary via Wiktextract

Usage: countable, uncountable

No example sentence was provided for this meaning.

Meaning relationships

Synonyms: none provided

Antonyms: none provided

2

noun

Meaning 2

the milky iridescent appearance of a dense transparent medium when it is illuminated by polychromatic visible radiation (such as sunlight) due to local fluctuations in its density and therefore in its refractive index

Definition source: English Wiktionary via Wiktextract

Usage: countable, uncountable

Topics: natural-sciences, physical-sciences, physics

No example sentence was provided for this meaning.

Meaning relationships

Synonyms: none provided

Antonyms: none provided

3

noun

Meaning 3

the visual property of something having a milky brightness and a play of colors from the surface

Definition source: Princeton WordNet 3.0

No example sentence was provided for this meaning.

Meaning relationships

Synonyms: iridescence

Antonyms: none provided

Broader terms: brightness

History

Etymology

Etymology tree English opal Proto-Indo-European *-éh1ti Proto-Indo-European *-sḱéti Proto-Indo-European *-éh1sḱeti Proto-Italic *-ēskō Latin -ēscō Latin -escensder. English -escence English opalescence From opal + -escence.

Across languages

Translations

2 source translations are retained for this English entry.

  • Czech: opalescence — state of being opalescent
  • Czech: opalizace — state of being opalescent