zero-gravityhttp://www.oed.com/dictionary/zero-gravity_n%3Ftab%3Dmeaning_and_usezero gravity, n. & adj.
Revised 2018

zero gravitynoun & adjective

  1. 1915–
    a. n. The state or condition in which there is no apparent force of gravity acting on a body, either because the force is locally weak, or because both the body and its surroundings are freely and equally accelerating under gravity = weightlessness n.; b. adj. possessing or characterized by zero gravity; designed for use in zero gravity; occurring in zero gravity.
    Abbreviated zero-G.
    1. 1915
      If a man should be placed, in imagination, at the ‘point of zero gravity’ between the earth and the moon, it is not at all obvious how he would proceed to measure a given mass with a beam-balance.
      Science 5 February 208/2
    2. 1951
      I'll take you into the zero-gravity section and see how you manage there.
      A. C. Clarke, Sands of Mars i. 5
    3. 1968
      Astronauts of the future will probably have to build vehicles in space. This will entail joining different metals together under zero-gravity conditions.
      New Scientist 12 September 545/1
    4. 1984
      Two of the first drugs that will be produced in zero gravity in mass quantities are beta cells..and interferon.
      News (Mexico City) 12 March 22/4
    5. 1997
      Mention the orbiting Russian space station [sc. Mir], and people..will talk eagerly about zero-gravity toilets.
      Independent (Nexis) 19 August 13
    6. 2015
      In between rungs, you reach a moment of zero gravity where your body is almost weightless.
      Esquire September 58/2

Originally published as part of the entry for zero, n. & adj.

zero, n. & adj. was revised in June 2018.