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Definition of Scintillating scotoma
1. Noun. A localized area of diminished vision edged by shimmering colored lights; in many people it indicates the onset of migraine.
Medical Definition of Scintillating scotoma
1. A localised area of blindness edged by brilliantly coloured shimmering lights (teichopsia); usually a prodromal symptom of migraine. See: fortification spectrum. Synonym: flittering scotoma. (05 Mar 2000)