universal gravitation

From The Collaborative International Dictionary of English v.0.48:

Gravitation \Grav"i*ta"tion\, n. [Cf. F. gravitation. See
   1. The act of gravitating.
      [1913 Webster]

   2. (Pysics) 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.
      [1913 Webster]

   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
      [1913 Webster]
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