normal curve(n = noun.cognition) bell-shaped curve, gaussian curve, gaussian shape - a symmetrical curve representing the normal distribution; Array
is a kind of curve, curved shape

bell-shaped curve, blind curve, characteristic curve, closed curve, curve, curve ball, exponential curve, frequency-response curve, gaussian curve, jordan curve, laffer curve, normal, normal distribution, normal dwarf, normal fault, normal school, regression curve, simple closed curve, sine curve