tactual sensation

NOUN
17 LETTERS · STARTS WITH T

tactual sensation is a valid 17-letter word worth 18 points in Scrabble and 23 points in Words with Friends.

SCRABBLE WORDS WITH FRIENDS
T1A1C3T1U1A1L1S1E1N1S1A1T1I1O1N1
1 + 1 + 3 + 1 + 1 + 1 + 1 + 0 + 1 + 1 + 1 + 1 + 1 + 1 + 1 + 1 + 1 =18 PTS
DOUBLE WORD → 36TRIPLE WORD → 54
MEANING

What does tactual sensation mean?