neptunium series

16 LETTERS · STARTS WITH N

neptunium series is a valid 16-letter word worth 19 points in Scrabble and 25 points in Words with Friends.

SCRABBLE WORDS WITH FRIENDS

N1E1P3T1U1N1I1U1M3S1E1R1I1E1S1

1 + 1 + 3 + 1 + 1 + 1 + 1 + 1 + 3 + 0 + 1 + 1 + 1 + 1 + 1 + 1 =19 PTS

DOUBLE WORD → 38TRIPLE WORD → 57

MEANING

What does neptunium series mean?