Etymology
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impetigo (n.)

pustular disease of the skin, late 14c., from Latin impetigo "skin eruption," from impetere "to attack" (see impetus). Originally used generally; the sense narrowed in modern times to specific diseases. Related: Impetiginous.

updated on October 27, 2015

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Definitions of impetigo from WordNet

impetigo (n.)
a very contagious infection of the skin; common in children; localized redness develops into small blisters that gradually crust and erode;
Etymologies are not definitions. From wordnet.princeton.edu, not affiliated with etymonline.