superficial extension

21 LETTERS · STARTS WITH S

superficial extension is a valid 21-letter word worth 34 points in Scrabble and 40 points in Words with Friends.

SCRABBLE WORDS WITH FRIENDS

S1U1P3E1R1F4I1C3I1A1L1E1X8T1E1N1S1I1O1N1

1 + 1 + 3 + 1 + 1 + 4 + 1 + 3 + 1 + 1 + 1 + 0 + 1 + 8 + 1 + 1 + 1 + 1 + 1 + 1 + 1 =34 PTS

DOUBLE WORD → 68TRIPLE WORD → 102

MEANING

What does superficial extension mean?