Microgravity

A condition the force of gravity is very low, producing a near-weightless environment.
Found on http://planetfacts.org/space-terms/

microgravity

a measure of the degree to which an object in space is subjected to acceleration. In general parlance the term is used synonymously with zero gravity ...
Found on http://www.britannica.com/eb/a-z/m/85

Microgravity

An environment of very weak gravitational forces, such as those within an orbiting spacecraft. Microgravity conditions in space stations may allow experiments or manufacturing processes that are not possible on Earth.
Found on http://www.braeunig.us/space/glossary.htm

Microgravity

The condition of near weightlessness induced by free-fall or unpowered space flight. It also refers to the scientific discipline concerned with the evaluation of the processes in a near-zero gravity environment, particularly those of fluid physics, life, and material sciences.
Found on http://www.diracdelta.co.uk/science/source/m/i/microgravity/source.html

microgravity

The condition of near-weightlessness induced by freefall or unpowered spaceflight. It is characterized by the virtual absence of gravity-induced convection, hydrostatic pressure, and sedimentation.
Found on http://www.daviddarling.info/encyclopedia/M/microgravity.html
No exact match found