surface gravity

15 LETTERS · STARTS WITH S

surface gravity is a valid 15-letter word worth 26 points in Scrabble and 29 points in Words with Friends.

SCRABBLE WORDS WITH FRIENDS

S1U1R1F4A1C3E1G2R1A1V4I1T1Y4

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

DOUBLE WORD → 52TRIPLE WORD → 78

MEANING

What does surface gravity mean?