from The American Heritage® Dictionary of the English Language, 4th Edition
- n. Excess pigmentation, especially of the skin.
from Wiktionary, Creative Commons Attribution/Share-Alike License
- n. The darkening of an area of skin or nails, caused by increased melanin.
from The Century Dictionary and Cyclopedia
- n. An excess of pigmentation.
from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
- n. unusual darkening of the skin
hyper- + pigmentation (Wiktionary)