bezel

Noun

bezel (plural bezels)

1. The sloping edge or face on a cutting tool.
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. 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.
   • “There,” she went on, “it must be one like to it, and yet never did I see one like to it, for thereto hung a history, and he who wore it prized it much. But the scarab that I knew was not set thus in the bezel of a ring.1886 October – 1887 January, H[enry] Rider Haggard, She: A History of Adventure, London: Longmans, Green, and Co., published 1887, →OCLC

   Synonyms:

   collet

4. (industrial design) A formed external frame or cover affixed to a device for protective or aesthetic purpose
   • Modern smartphones have very thin bezels.