feedback amplifier

18 LETTERS · STARTS WITH F

feedback amplifier is a valid 18-letter word worth 36 points in Scrabble and 41 points in Words with Friends.

SCRABBLE WORDS WITH FRIENDS

F4E1E1D2B3A1C3K5A1M3P3L1I1F4I1E1R1

4 + 1 + 1 + 2 + 3 + 1 + 3 + 5 + 0 + 1 + 3 + 3 + 1 + 1 + 4 + 1 + 1 + 1 =36 PTS

DOUBLE WORD → 72TRIPLE WORD → 108

MEANING

What does feedback amplifier mean?