diatonic semitone

17 LETTERS · STARTS WITH D

diatonic semitone is a valid 17-letter word worth 21 points in Scrabble and 25 points in Words with Friends.

SCRABBLE WORDS WITH FRIENDS

D2I1A1T1O1N1I1C3S1E1M3I1T1O1N1E1

2 + 1 + 1 + 1 + 1 + 1 + 1 + 3 + 0 + 1 + 1 + 3 + 1 + 1 + 1 + 1 + 1 =21 PTS

DOUBLE WORD → 42TRIPLE WORD → 63

MEANING

What does diatonic semitone mean?