grayout

(redirected from gray-outs)

grayout

The perception of a transient loss or dimming of light, color, or clarity in one's vision due to a lack of oxygen reaching the brain. The intense g-forces can cause grayouts in fighter pilots, but they are usually still able to maintain control of the vehicle.
Farlex Dictionary of Idioms. © 2015 Farlex, Inc, all rights reserved.
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