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Actinic keratosis
Meaning
Noun
●
In Dermatology, Medicine & Pathology:
A
potentially
precancerous
skin
lesion
,
typically
on the
upper
portion
of the
head
,
characterized
by
discolored
,
thickened
or
scaly
growths
of
keratin
and
caused
by
repeated
exposure
to
ultraviolet light
, such as from
sunlight
or
tanning
beds.
Sourced from
Wiktionary
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