airborne radioactivity

22 LETTERS · STARTS WITH A

airborne radioactivity is a valid 22-letter word worth 32 points in Scrabble and 35 points in Words with Friends.

SCRABBLE WORDS WITH FRIENDS

A1I1R1B3O1R1N1E1R1A1D2I1O1A1C3T1I1V4I1T1Y4

1 + 1 + 1 + 3 + 1 + 1 + 1 + 1 + 0 + 1 + 1 + 2 + 1 + 1 + 1 + 3 + 1 + 1 + 4 + 1 + 1 + 4 =32 PTS

DOUBLE WORD → 64TRIPLE WORD → 96

MEANING

What does airborne radioactivity mean?