harmonic series

15 LETTERS · STARTS WITH H

harmonic series is a valid 15-letter word worth 21 points in Scrabble and 23 points in Words with Friends.

SCRABBLE WORDS WITH FRIENDS

H4A1R1M3O1N1I1C3S1E1R1I1E1S1

4 + 1 + 1 + 3 + 1 + 1 + 1 + 3 + 0 + 1 + 1 + 1 + 1 + 1 + 1 =21 PTS

DOUBLE WORD → 42TRIPLE WORD → 63

MEANING

What does harmonic series mean?