Opsin

noun

noun ·Rare ·Advanced level

Definitions

Noun
  1. 1
    Any 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."

  2. 2
    retinal protein formed by the action of light on rhodopsin wordnet

Example

More examples

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

Etymology

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

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Data sourced from Wiktionary, WordNet, CMU, and other open linguistic databases. Updated March 2026.