Dictionary
ze'ro grav'ity
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,ze•ro-g,ze•ro-GPronunciation: (zēr'ō-jē'). [key]Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.