radiosonde balloon

18 LETTERS · STARTS WITH R

radiosonde balloon is a valid 18-letter word worth 21 points in Scrabble and 26 points in Words with Friends.

SCRABBLE WORDS WITH FRIENDS

R1A1D2I1O1S1O1N1D2E1B3A1L1L1O1O1N1

1 + 1 + 2 + 1 + 1 + 1 + 1 + 1 + 2 + 1 + 0 + 3 + 1 + 1 + 1 + 1 + 1 + 1 =21 PTS

DOUBLE WORD → 42TRIPLE WORD → 63

MEANING

What does radiosonde balloon mean?