The Collaborative International Dictionary
G suit \G suit\ G-suit \G-suit\ n. [gravity + suit. 1944[MW10]] (Aeronautics) A suit worn by aviators and astronauts, designed to counteract the effects of high accelerations experienced in aerial maneuvers, in particular to avoid unconsciousness; called also anti-g suit. It exerts force on the abdomen and legs to prevent blackouts by counteracting the tendency of blood to accumulate below the heart, thus reducing the supply to the brain, when the forces due to acceleration are directed from head to toe.
Usage examples of "g suit".
The plane kicked him in the back, and he felt the anti-G suit compensate for the sudden surge of acceleration.
Over all this she wore a G suit, torso harness and survival vest, to which was attached an inflatable life vest.
The G suit is working, but he bent his head when he turned instead of bracing it against the headrest, and he has taken the murderous G's in his neck muscles.