opsin

O1P3S1I1N1

noun

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

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Meanings

nounopsin (plural opsins)

plural opsins

  1. biochemistryAny of a group of light-sensitive proteins in the retina.

    Ramirez and Oakley therefore predicted that opsins are present in octopus skin, where they might act as light sensors.

    2015 May 20, Mo Costandi, The Guardian

Origin

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

Full word history & related roots →

Translations

Chinese Mandarin 視蛋白 /视蛋白
  • 視蛋白 /视蛋白 (shìdànbái)Translations
French opsine
  • opsineTranslations
German Opsin
  • OpsinTranslations
Italian opsina
  • opsinaTranslations
Portuguese opsina
  • opsinaTranslations

Rhymes & wordplay

Anagrams

psionPinosSinopSpino
Cite this entry
APA

opsin. (n.d.). In WatkinsX Dictionary. Retrieved November 2, 2026, from https://dictionary.watkinsx.com/word/opsin

MLA

“opsin.” WatkinsX Dictionary, https://dictionary.watkinsx.com/word/opsin. Accessed November 2, 2026.

Chicago

WatkinsX Dictionary, s.v. “opsin,” accessed November 2, 2026, https://dictionary.watkinsx.com/word/opsin.

Source: opsin on Wiktionary, CC BY-SA 4.0.