0 the state of having or appearing to have no weight; the fact of not being affected by gravity (= the force that makes things fall to the ground):
A University of Colorado experiment to test the effects of long-term weightlessness on antibiotic production will fly to the International Space Station on Thursday.
The observed effects of weightlessness include motion sickness, cardiovascular deconditioning, red blood cell mass loss, and bone mineral loss.
You can simulate rocket mode and experience the feeling of weightlessness and flying.
The weightlessness of onsets directly follows from this approach.
Both countries sent carefully monitored dogs and primates into orbit to study the effects of weightlessness on living creatures.
The child dreams of flying like a bird that carries with it the illusion of weightlessness and of overcoming the apparently unavoidable burden of gravity.
The percentage values noted for physiological, quasi-physiological (feelings of weightlessness etc) and behavioural reactions are 23, 9 and 21, respectively.
This essay attempts to develop an understanding of different approaches to the issue of weight and weightlessness in architecture and civil engineering.
