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In stereochemistry, on the opposite side of a reference plane; for example, the stereochemical outcome of an addition reaction where the new bonds are on the opposite side of the original pi bond is called anti addition.
A piece of clothing worn by combat pilots and astronauts. It exerts pressure on the abdomen and the lower limbs of the aircrew to prevent or retard the flow of blood below the chest when under positive acceleration. This delays the onset of the gray-out or blackout phenomena some pilots may experience. A g-suit increases the gray-out or blackout threshold by 1¼ to 2 g. The same as anti-g suit.