1. a dark brown or black pigment produced in the skin, hair, and eyes that provides color and protection from ultraviolet radiation
Usage: technical/scientific term; typically used in biology, dermatology, and genetics contexts

Examples

• Eumelanin is the primary pigment responsible for dark skin tones in humans.
• People with higher levels of eumelanin in their skin have greater natural protection against sunburn.
• The concentration of eumelanin in hair determines whether someone has black, brown, or dark blonde hair.
• Eumelanin production increases when skin is exposed to sunlight, causing a tan.
• Genetic variations in eumelanin production contribute to the diversity of human skin colors.