overhead-valve engine

21 LETTERS · STARTS WITH O

overhead-valve engine is a valid 21-letter word worth 33 points in Scrabble and 39 points in Words with Friends.

SCRABBLE WORDS WITH FRIENDS

O1V4E1R1H4E1A1D2-0V4A1L1V4E1E1N1G2I1N1E1

1 + 4 + 1 + 1 + 4 + 1 + 1 + 2 + 0 + 4 + 1 + 1 + 4 + 1 + 0 + 1 + 1 + 2 + 1 + 1 + 1 =33 PTS

DOUBLE WORD → 66TRIPLE WORD → 99

MEANING

What does overhead-valve engine mean?