Wiktionary
n. a proposed science involving the use of an electric field to charge (or polarize) an object so as to counteract the effects of gravity.
Wikipedia
Electrogravitics is claimed to be an unconventional type of effect or anti-gravity propulsion created by an electric field's effect on a mass. The name was coined in the 1920s by the discoverer of the effect, Thomas Townsend Brown, who spent most of his life trying to develop it and sell it as a propulsion system. Through Brown's promotion of the idea it was researched for a short while by aerospace companies in the 1950s. Electrogravitics is popular with conspiracy theorists with claims that it is powering flying saucers and the B-2 Stealth Bomber.
Since apparatus based on Browns' ideas have often yielded varying and highly controversial results when tested within controlled vacuum conditions, the effect observed has often been attributed to the ion drift or ion wind effect instead of anti-gravity.
Brown also named this phenomenon the " Biefeld–Brown effect" after his claimed mentor, Denison University professor Paul Alfred Biefeld.
Usage examples of "electrogravitics".
In fact, any sound or vibration would be a very bad sign indeed, shock waves overloading the antisound suppressors, jolts maxing out the electrogravitics, supports buckling and bulkheads crumpling.