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ace·phal·gic migraine | \ ˌā-sə-ˈfal-jik- 
\
\ plural acephalgic migraines
Definition of acephalgic migraine
: a migraine in which an aura involving visual disturbances (such as diplopia, scotoma, or tunnel vision) is the main symptom and is not accompanied by headache
— called also silent migraine
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