noun ·Rare ·Advanced level

Definitions

Noun

1. 1
   Any of several colouring matters, red, green, yellow, etc., present in the inner segments in the cones of the retina, held in solution by fats, and slowly decolorized by light; distinct from the photochemical pigments of the rods of the retina.

Etymology

From chromo- + -phane.

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