What does "hyperpigmentation" mean?

A high degree of pigmentation; too much pigmentation.

What is a synonym for "hyperpigmentation"?

Common synonyms include: discoloration, melanosis, pigmentation.

noun

noun ·Rare ·Advanced level

Noun

1
A high degree of pigmentation; too much pigmentation. uncountable, usually
2
unusual darkening of the skin wordnet
3
A high degree of pigmentation; too much pigmentation.; The darkening of an area of skin or nails, caused by increased melanin. uncountable, usually

From hyper- + pigmentation.