main sequence

13 LETTERS · STARTS WITH M

main sequence is a valid 13-letter word worth 25 points in Scrabble and 30 points in Words with Friends.

SCRABBLE WORDS WITH FRIENDS

M3A1I1N1S1E1Q10U1E1N1C3E1

3 + 1 + 1 + 1 + 0 + 1 + 1 + 10 + 1 + 1 + 1 + 3 + 1 =25 PTS

DOUBLE WORD → 50TRIPLE WORD → 75

MEANING

What does main sequence mean?