acceleration in Latin

(uncountable) The act of accelerating, or the state of being accelerated; increase of motion or action; as opposed to retardation or deceleration.

(uncountable) The act of accelerating, or the state of being accelerated; increase of motion or action; as opposed to retardation or deceleration.

(countable) The amount by which a speed or velocity increases (and so a scalar quantity or a vector quantity).