అర్థం : A decrease in rate of change.
							ఉదాహరణ : 
							The deceleration of the arms race.
							
పర్యాయపదాలు : deceleration, slowing
An increase in rate of change.
Modern science caused an acceleration of cultural change.అర్థం : The extent to which something is delayed or held back.
అర్థం : Lack of normal development of intellectual capacities.
పర్యాయపదాలు : backwardness, mental retardation, slowness, subnormality
Retardation meaning in Telugu.