1. The act of accelerating; the state of being accelerated. Acceleration of the moon, her increase of mean motion, compared with the diurnal motion of the earth, being about 10" in a hundred years. Acceleration of a planet is when its real diurnal motion exceeds its mean diurnal motion. The diurnal acceleration of the fixed stars is the time by which they, in one revolution, anticipate the mean diurnal revolution of the sun, which is nearly 3'50" of mean time sooner each day.

Nuttall's Standard dictionary of the English language By Nuttall, P.Austin

• accellerations,
• accelertaion,
• deacceleration,
• exceleration,
• accelleration,
• accelelartion,
• acceleraction,
• acclleration,
• accelertation,
• accelertion,
• accelartion,
• accesleration,
• accereration,
• ecceleration,
• acelleration,
• accleration,
• accellaration,
• aceleration,
• acceelration,
• accelration

• accelerated,
• accelerating,
• accelerate,
• accelerator,
• accelerative,
• accelerometer,
• accelerando,
• acceleratory.

The adjective form of the word "acceleration" is "accelerative".

The plural of the "acceleration" can be the "accelerations".

The singular of the "acceleration" can be the "acceleration".