noun ·Rare ·Advanced level

Definitions

Noun

1. 1
   An animal condition in which there is partial loss of pigmentation resulting in white, pale, or patchy coloration of the skin, hair, feathers, scales or cuticle, but not the eyes (caused by a reduction in multiple types of pigment, not just melanin). uncountable

Etymology

From leuco- + -ism.

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