resonance cavity

16 LETTERS · STARTS WITH R

resonance cavity is a valid 16-letter word worth 25 points in Scrabble and 29 points in Words with Friends.

SCRABBLE WORDS WITH FRIENDS

R1E1S1O1N1A1N1C3E1C3A1V4I1T1Y4

1 + 1 + 1 + 1 + 1 + 1 + 1 + 3 + 1 + 0 + 3 + 1 + 4 + 1 + 1 + 4 =25 PTS

DOUBLE WORD → 50TRIPLE WORD → 75

MEANING

What does resonance cavity mean?