sacrificial anode

17 LETTERS · STARTS WITH S

sacrificial anode is a valid 17-letter word worth 24 points in Scrabble and 28 points in Words with Friends.

SCRABBLE WORDS WITH FRIENDS

S1A1C3R1I1F4I1C3I1A1L1A1N1O1D2E1

1 + 1 + 3 + 1 + 1 + 4 + 1 + 3 + 1 + 1 + 1 + 0 + 1 + 1 + 1 + 2 + 1 =24 PTS

DOUBLE WORD → 48TRIPLE WORD → 72

MEANING

What does sacrificial anode mean?