Standard Lemma guide

opsin

noun · 2 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

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No pronunciation record was provided for this word.

1

noun

Meaning 1

Any of a group of light-sensitive proteins in the retina.

Definition source: English Wiktionary via Wiktextract

Topics: biochemistry, biology, chemistry, microbiology, natural-sciences, physical-sciences

No example sentence was provided for this meaning.

Meaning relationships

Synonyms: none provided

Antonyms: none provided

2

noun

Meaning 2

retinal protein formed by the action of light on rhodopsin

Definition source: Princeton WordNet 3.0

No example sentence was provided for this meaning.

Meaning relationships

Synonyms: none provided

Antonyms: none provided

Broader terms: protein

History

Etymology

Shortened form of rhodopsin. From Ancient Greek ὄψις (ópsis, “sight”) + -in.

Across languages

Translations

5 source translations are retained for this English entry.

  • Chinese Mandarin: 視蛋白 /视蛋白 (shìdànbái) — Translations
  • French: opsine — Translations
  • German: Opsin — Translations
  • Italian: opsina — Translations
  • Portuguese: opsina — Translations