antigravity

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Related to anti-G: anti-G suit, G antigen

an·ti·grav·i·ty

 (ăn′tē-grăv′ĭ-tē, ăn′tī-)
n.
The hypothetical effect of reducing or canceling a gravitational field.

an′ti·grav′i·ty adj.
American Heritage® Dictionary of the English Language, Fifth Edition. Copyright © 2016 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.

antigravity

(ˌæntɪˈɡrævɪtɪ)
adj
acting against the force of gravity
n
the concept of negating the force of gravity
Collins English Dictionary – Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014

an•ti•grav•i•ty

(ˌæn tiˈgræv ɪ ti, ˌæn taɪ-)

n.
1. a hypothetical force by which a body of positive mass would repel a body of negative mass.
adj.
2. counteracting the force of gravity.
[1940–45]
Random House Kernerman Webster's College Dictionary, © 2010 K Dictionaries Ltd. Copyright 2005, 1997, 1991 by Random House, Inc. All rights reserved.
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When they accelerated me to 6 g's (which SpaceShip2 will experience during re-entry), I had to quickly apply the anti-g straining maneuvers (clenching lower and upper body, pressured breathing) in order to keep my peripheral vision from closing in on me and to maintain consciousness.
(AFMCNS) -- Popular Science magazine recognized an Air Force Test Pilot School-tested prototype anti-G suit as one of the "Top 100" technology developments of 2000.
Unlike current anti-G suits that use pressurized air, Libelle uses liquid to protect fighter pilots as they make rapid turns and changes in flight paths, which Increases gravity forces on the body.