inversion temperature

21 LETTERS · STARTS WITH I

inversion temperature is a valid 21-letter word worth 27 points in Scrabble and 33 points in Words with Friends.

SCRABBLE WORDS WITH FRIENDS

I1N1V4E1R1S1I1O1N1T1E1M3P3E1R1A1T1U1R1E1

1 + 1 + 4 + 1 + 1 + 1 + 1 + 1 + 1 + 0 + 1 + 1 + 3 + 3 + 1 + 1 + 1 + 1 + 1 + 1 + 1 =27 PTS

DOUBLE WORD → 54TRIPLE WORD → 81

MEANING

What does inversion temperature mean?