mnemonic device

15 LETTERS · STARTS WITH M

mnemonic device is a valid 15-letter word worth 26 points in Scrabble and 33 points in Words with Friends.

SCRABBLE WORDS WITH FRIENDS

M3N1E1M3O1N1I1C3D2E1V4I1C3E1

3 + 1 + 1 + 3 + 1 + 1 + 1 + 3 + 0 + 2 + 1 + 4 + 1 + 3 + 1 =26 PTS

DOUBLE WORD → 52TRIPLE WORD → 78

MEANING

What does mnemonic device mean?