Gravitation /(?)/

Grav·i·ta·tion

Gravitation

n.
  1. The act of gravitating.
  2. That species of attraction or force by which all bodies or particles of matter in the universe tend toward each other; called also attraction of gravitation, universal gravitation, and universal gravity. See Attraction, and Weight. (Pysics)

Phrases & Compounds
Law of gravitation
that law in accordance with which gravitation acts, namely, that every two bodies or portions of matter in the universe attract each other with a force proportional directly to the quantity of matter they contain, and inversely to the squares of their distances.