\Ouch\ (ouch), n. [OE. ouch, nouche (a nouch being taken
for an ouch: cf. {Adder}), fr. OF. nusche, nosche, nousche,
buckle, clasp, LL. nusca, fr. OHG. nusca, nuscha.]
A socket or bezel holding a precious stone; hence, a jewel or
ornament worn on the person.

      A precious stone in a rich ouche.        --Sir T.
                                               Elyot.

      Your brooches, pearls, and ouches.       --Shak.