the partial loss of consciousness that is due to a lack of oxygen in the blood resulting in hypoxia. Happens to mountain climbers and pilots. Sensory, motor and mental abilities are dulled.

GRAY-OUT: "Joe experienced a grey out from the altitude."
Cite this page: N., Pam M.S., "GRAY-OUT," in, May 11, 2013, (accessed May 10, 2021).