erythema migrans
noun
erythema mi·grans
-ˈmī-grənz
variants
or erythema chronicum migrans
: 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 (such as the deer tick) infected with the causative spirochete
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Merriam-Webster unabridged
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