The psychophysiologic effect of zero gravity, as experienced by someone falling freely in a vacuum ( e.g., astronauts in a stable orbit). A temporary state of simulated w. can be achieved during powered flight within the earth's atmosphere by traversing an inverted parabolic curve where gravitational pull and centrifugal force cancel each other out.

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weight·less·ness 'wāt-ləs-nəs n the state or condition of having little or no weight due to lack of apparent gravitational pull
weight·less adj

Medical dictionary. 2011.

Look at other dictionaries:

  • weightlessness — 1884, from WEIGHT (Cf. weight) + LESS (Cf. less) + NESS (Cf. ness) …   Etymology dictionary

  • Weightlessness — Zero gravity redirects here. For other uses, see Zero gravity (disambiguation). Zero G redirects here. For other uses, see Zero G (disambiguation). 0G redirects here. For other uses, see 0G (disambiguation). Weightlessness (or zero g) is the… …   Wikipedia

  • weightlessness — See weightlessly. * * * ▪ physics  condition experienced while in free fall (q.v.), in which the effect of gravity is canceled by the inertial (e.g., centrifugal) force resulting from orbital flight. The term zero gravity is often used to… …   Universalium

  • weightlessness — nesvarumas statusas T sritis fizika atitikmenys: angl. nullgravity; weightlessness; zero gravity vok. Gewichtslosigkeit, f; Schwerelosigkeit, f; Schwerlosigkeit, f rus. невесомость, f pranc. apesanteur, m; impondérabilité, f; non pesanteur, m …   Fizikos terminų žodynas

  • weightlessness — weightless ► ADJECTIVE ▪ (of a body) not apparently acted on by gravity. DERIVATIVES weightlessly adverb weightlessness noun …   English terms dictionary

  • weightlessness — noun see weightless …   New Collegiate Dictionary

  • weightlessness — noun a) The state of being free from the effects of gravity. b) An experience or instance of being weightless. Syn: zero gravity …   Wiktionary

  • weightlessness — Synonyms and related words: airiness, ascent, asteroids, aurora particles, blackout, bubbliness, buoyancy, cosmic particles, cosmic ray bombardment, daintiness, delicacy, downiness, ethereality, floatability, fluffiness, foaminess, frothiness,… …   Moby Thesaurus

  • weightlessness — weight·less·ness || weɪtlɪsnɪs n. lack of weight, lack of gravity …   English contemporary dictionary

  • weightlessness — weight·less·ness …   English syllables

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