borderline intelligence
a level of measured intellectual performance between average and significantly subaverage intelligence. Some researchers define it as an IQ between 68 and 83, others as any IQ in the 70s, but it is most often associated with IQs in the range 70 to 75. IQs in the borderline range, especially above 75, do not justify a basis for diagnosis of intellectual disability. Also called borderline intellectual functioning; borderline mental retardation.