intellectual disability

An IQ below 70 generally indicates someone with intellectual disability (ID).

First, there may have been fewer people with intellectual disability than there are now.

Rudy is also intellectually delayed—an IQ test placed him at the borderline of intellectual disability.

Nay, though one went from the dead, he could not bring it home to her that unsatisfied sex- uality is an intellectual disability.

For some of the main historic facts on intellectual disability, see Westermarck, pp. 264-277.