bevel gear

NOUN /bɛvəl_gir/
10 LETTERS · 2 SYLLABLES · STARTS WITH B

bevel gear is a valid 10-letter word worth 15 points in Scrabble and 19 points in Words with Friends.

SCRABBLE WORDS WITH FRIENDS
B3E1V4E1L1G2E1A1R1
3 + 1 + 4 + 1 + 1 + 0 + 2 + 1 + 1 + 1 =15 PTS
DOUBLE WORD → 30TRIPLE WORD → 45
MEANING

What does bevel gear mean?