pressure altimeter

18 LETTERS · STARTS WITH P

pressure altimeter is a valid 18-letter word worth 21 points in Scrabble and 25 points in Words with Friends.

SCRABBLE WORDS WITH FRIENDS

P3R1E1S1S1U1R1E1A1L1T1I1M3E1T1E1R1

3 + 1 + 1 + 1 + 1 + 1 + 1 + 1 + 0 + 1 + 1 + 1 + 1 + 3 + 1 + 1 + 1 + 1 =21 PTS

DOUBLE WORD → 42TRIPLE WORD → 63

MEANING

What does pressure altimeter mean?