im·pe·ti·go  (ĭm'pĭ-tī'gō)  n. pl. im·pe·ti·gos A contagious bacterial skin infection, usually of children, that is characterized by the eruption of superficial pustules and the formation of thick yellow crusts, commonly on the face. [Middle English, from Latin impetīgō, from impetere, to attack; see impetus.] im'pe·tig'e·nous (-tĭj'ə-nəs) adj. |