spatial extension

17 LETTERS · STARTS WITH S

spatial extension is a valid 17-letter word worth 25 points in Scrabble and 29 points in Words with Friends.

SCRABBLE WORDS WITH FRIENDS

S1P3A1T1I1A1L1E1X8T1E1N1S1I1O1N1

1 + 3 + 1 + 1 + 1 + 1 + 1 + 0 + 1 + 8 + 1 + 1 + 1 + 1 + 1 + 1 + 1 =25 PTS

DOUBLE WORD → 50TRIPLE WORD → 75

MEANING

What does spatial extension mean?