zero-gs

zero gravity

noun Physics.
the condition in which the apparent effect of gravity is zero, as in the case of a body in free fall or in orbit.
Also, zero-g, zero-G [zeer-oh-jee] .


Origin:
1950–55

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World English Dictionary
zero gravity
 
n
the state or condition of weightlessness

Collins English Dictionary - Complete & Unabridged 10th Edition
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American Heritage
Science Dictionary
zero gravity  
The condition of real or apparent weightlessness occurring when any gravitational forces acting on a body meet with no resistance so the body is allowed to accelerate freely. Bodies in free fall (including trajectories like orbits) experience zero gravity; bodies at rest on the Earth's surface do not, since they are subject to the counterforce of the surface supporting them.
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