blackout

blackout
1. Temporary loss of consciousness due to decreased blood flow to the brain. 2. Momentary loss of consciousness, as in absence. 3. Temporary loss of vision, without alteration of consciousness, due to positive g (gravity) forces; caused by temporary decreased blood flow in the central retinal artery, and seen mostly in aviators. 4. A transient episode that occurs during a state of intense intoxication (alcoholic b.) for which the person has no recall, although not unconscious (as observed by others).
- visual b. amaurosis fugax.

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black·out 'blak-.au̇t n a transient dulling or loss of vision, consciousness, or memory <an alcoholic \blackout> compare GRAYOUT, REDOUT

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black·out (blakґout) a condition characterized by failure of vision and momentary unconsciousness, due to diminished circulation to the brain.

Medical dictionary. 2011.

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