Jewel Jew"el, n. [OE. juel, jowel, OF. jouel, juel, joiel, F. joyau, dim. of OF. joie joy, jewel, F. joie joy. See Joy.] 1. An ornament of dress usually made of a precious metal, and having enamel or precious stones as a part of its design. Plate of rare device, and jewels Of rich and exquisite form. --Shak. 2. A precious stone; a gem. --Shak. 3. An object regarded with special affection; a precious thing. ``Our prince (jewel of children).'' --Shak. 4. A bearing for a pivot a pivot in a watch, formed of a crystal or precious stone, as a ruby. Jewel block (Naut.), block at the extremity of a yard, through which the halyard of a studding sail is rove.