mentally retarded
retarded
developmentally challenged

There are also changes in the state's treatment of the mentally retarded.

But a person can know right from wrong and still be mentally retarded.

You're like the little mentally retarded sister I never had.

She has to face the fact that he will always be a person who is mentally retarded.

The doctor didn't tell the couple the mother was mentally retarded.

He was thought to be mentally retarded until the age of seven.

She is teaching a 29-year-old mentally retarded woman to read and write.

A special school for mentally retarded people is working here.

They did a whole piece on kids with mentally retarded parents.

With so many mentally retarded people out on the town, they felt less alone than ever before, their families said.