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Pronunciation: po′lē-ō′sis
Definition: A patchy absence or lessening of melanin in hair of the scalp, brows, or lashes, due to lack of pigment in the epidermis; it occurs in several hereditary syndromes but may be caused by inflammation, irradiation, or infection such as herpes zoster.
Synonym(s): trichopoliosis
[G., fr. polios, gray]
Examples: glitazone, GI cocktail, etc.
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