-ˈmīgrənz noun
or erythema chron·i·cum migrans -ˌkränəkəm-
Etymology: erythema migrans from New Latin, literally, migrating erythema; erythema chronicum migrans , from New Latin, literally, chronic migrating erythema
: 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