mental retardation

NOUN /mɛntəl_,ritɑr'deɪʃən/
18 LETTERS · STARTS WITH M

mental retardation is a valid 18-letter word worth 20 points in Scrabble and 24 points in Words with Friends.

SCRABBLE WORDS WITH FRIENDS
M3E1N1T1A1L1R1E1T1A1R1D2A1T1I1O1N1
3 + 1 + 1 + 1 + 1 + 1 + 0 + 1 + 1 + 1 + 1 + 1 + 2 + 1 + 1 + 1 + 1 + 1 =20 PTS
DOUBLE WORD → 40TRIPLE WORD → 60
MEANING

What does mental retardation mean?

NOUN · 1 SENSE