Definitions for

**"Gravitational constant"**Gravitational constant (G) is the universal constant in the equation for the gravitational force between two particles= Gm where is the distance between the particles and 1 and 2 are their masses.

The constant of proportionality in Newtonâ€(tm)s Law of Gravitation. It reflects the proportion of the gravitational force and , the product of two particlesâ€(tm) masses divided by the square of the bodiesâ€(tm) separation. N Â· m2/kg2.

A dimensionless conversion factor in English units which arises from Newton's second law (F= ma) when mass is expressed in pounds mass (lbm). gravitometer See "densimeter."