n. [ L. acceleratio: cf. F. accélération. ] The act of accelerating, or the state of being accelerated; increase of motion or action;
A period of social improvement, or of intellectual advancement, contains within itself a principle of acceleration. I. Taylor. [ 1913 Webster ]
Acceleration of the moon,
Acceleration and
retardation of the tides
Diurnal acceleration of the fixed stars,
Acceleration of the planets,