radio emission

NOUN
14 LETTERS · STARTS WITH R

radio emission is a valid 14-letter word worth 16 points in Scrabble and 18 points in Words with Friends.

SCRABBLE WORDS WITH FRIENDS
R1A1D2I1O1E1M3I1S1S1I1O1N1
1 + 1 + 2 + 1 + 1 + 0 + 1 + 3 + 1 + 1 + 1 + 1 + 1 + 1 =16 PTS
DOUBLE WORD → 32TRIPLE WORD → 48
MEANING

What does radio emission mean?