bezel

Short definition from Wiktionary

Noun

1. 1
   The sloping edge or face on a cutting tool.
2. 2
   The oblique side or face of a cut gem; especially the upper faceted portion of a brilliant (diamond), which projects from its setting.
3. 3
   The rim and flange which encompasses and fastens a jewel or other object, such as the crystal of a watch, in the cavity in which it is set.
4. 4
   The panel that covers the front of a computer case, or the panel covering each drive bay that can be removed to install a removable drive that requires external access, such as a CD/DVD-ROM drive, which usually has its own preinstalled bezel.
5. 5
   The area on the front of a computing device surrounding the display.