weightless

[weyt-lis]
adjective
being without apparent weight, as a freely falling body or a body acted upon by a force that neutralizes gravitation.

Origin:
1540–50; weight + -less

weightlessly, adverb
weightlessness, noun
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World English Dictionary
weightless (ˈweɪtləs)
 
adj
1.  (of a body) having no actual weight; a state in which an object has no actual weight (because it is in space and unaffected by gravitational attraction) or no apparent weight (because the gravitational attraction equals the centripetal force and the object is in free fall)
2.  commerce
 a.  (of economic activity) based on the supply of information and ideas rather than trade in physical goods: the weightless economy
 b.  (of a company) having very few physical assets: weightless dot.coms
 
'weightlessness
 
n

weightlessness (ˈweɪtlɪsnɪs)
 
n
a state in which an object has no actual weight (because it is in space and unaffected by gravitational attraction) or no apparent weight (because the gravitational attraction equals the centripetal force and the object is in free fall)
 
'weightless
 
adj

Collins English Dictionary - Complete & Unabridged 10th Edition
2009 © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
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Example sentences
Weightless, sinuous as a dolphin, you move through halls of light.
The poor thing was so dried out it was practically weightless.
And they don't laugh anymore because nothing is funny to them ever again after
  being weightless in space.
The long-term goal is to print a functioning spacecraft in a seemingly
  weightless environment.
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