# pinopsin

> English word · Noun

## Definitions
1. A type of opsin found in the pineal gland (mostly of chickens)

## Etymology
Blend of pineal + opsin.

## Source
Compiled from Wiktionary via kaikki.org (CC BY-SA). Data vintage: 2026-05-06.
Canonical page: https://plainspell.com/en/word/pinopsin