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Unusual darkening of the skin
Answer for the clue "Unusual darkening of the skin ", 17 letters:
hyperpigmentation
Word definitions for hyperpigmentation in dictionaries
Wikipedia
Word definitions in Wikipedia
Hyperpigmentation is the darkening of an area of skin or nails caused by increased melanin .
Wiktionary
Word definitions in Wiktionary
n. The darkening of an area of skin or nails, caused by increased melanin.
WordNet
Word definitions in WordNet
n. unusual darkening of the skin [ant: hypopigmentation ]
Usage examples of hyperpigmentation.
Anyway, basically, what a lab is going to be looking for is whether that hyperpigmentation is intracellular, as in melanocytes, which are the dark, pigmented cells that are much more concentrated in non-Caucasians, or intercellular.