center of gravity
n. pl. centers of gravity
► Abbr. CG The point in or near a body at which the gravitational potential energy of the body is equal to that of a single particle of the same mass located at that point and through which the resultant of the gravitational forces on the component particles of the body acts.
► The point of greatest importance, interest, or activity: “The center of gravity for the English language is no longer Britain. American English is the greatest influence on English everywhere” (Robert W. Burchfield).

[TahlilGaran] American Dictionary ▲