neurological disorder

NOUN
21 LETTERS · STARTS WITH N

neurological disorder is a valid 21-letter word worth 25 points in Scrabble and 31 points in Words with Friends.

SCRABBLE WORDS WITH FRIENDS
N1E1U1R1O1L1O1G2I1C3A1L1D2I1S1O1R1D2E1R1
1 + 1 + 1 + 1 + 1 + 1 + 1 + 2 + 1 + 3 + 1 + 1 + 0 + 2 + 1 + 1 + 1 + 1 + 2 + 1 + 1 =25 PTS
DOUBLE WORD → 50TRIPLE WORD → 75
MEANING

What does neurological disorder mean?