Meaning of microgravity

mi•cro•grav•i•ty

Pronunciation: (mī'krō-grav"i-tē), [key]
— n.
  1. a condition, esp. in space orbit, where the force of gravity is so weak that weightlessness results.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.