decay series

12 LETTERS · STARTS WITH D

decay series is a valid 12-letter word worth 17 points in Scrabble and 17 points in Words with Friends.

SCRABBLE WORDS WITH FRIENDS

D2E1C3A1Y4S1E1R1I1E1S1

2 + 1 + 3 + 1 + 4 + 0 + 1 + 1 + 1 + 1 + 1 + 1 =17 PTS

DOUBLE WORD → 34TRIPLE WORD → 51

MEANING

What does decay series mean?