Patchy absence of pigmentation of the hair or skin or, depending on the species, of feathers, scales, or other body surfaces.
Source:
PAC, 2016, 88, 713. 'Glossary of terms used in developmental and reproductive toxicology (IUPAC Recommendations 2016)' on page 792 (https://doi.org/10.1515/pac-2015-1202)