Main Entry: erythema mi·grans

Pronunciation: \-ˈmī-grənz\

Variant(s): or erythema chron·i·cum migrans \-ˌkrä-nə-kəm-\

Function: noun

Etymology: New Latin, literally, (chronic) migrating erythema

Date: 1979

: a red spreading annular skin lesion that is an early symptom of Lyme disease and that develops at the site of the bite of a tick (as the deer tick) infected with the causative spirochete