bezel
Concise Oxford English Dictionary © 2008 Oxford University Press:
bezel /ˈbɛz(ə)l/
▶noun a grooved ring holding the cover of a watch face or other instrument in position.
■ a groove holding the crystal of a watch or the stone of a gem in its setting.
– origin C16: from OFr., of unknown origin.
'bezel' also found in these Oxford entries:

