Obs. [dim. of BOSS sb.1; perhaps already in OF.] The print or ornamental medallion fixed in the bottom of a mazer or drinking bowl: = BOSS sb.1 3 d.
1495. Will of Rogers (Somerset Ho.). Grete masser wt the Image of S. James in the bossell thereof.
1497. Will of Butside (ibid.). A masser wt a turnyng bossell wt a brode bonde.
1498. Will of T. Johnson (ibid.). A grete bossell of siluer.