society > faith > artefacts > vestments > sartorial appurtenances > [noun] > rational > worn by bishops during celebration of mass (3)
An ornamental cloth, plate, or other decoration worn on or over a person's chest, esp. as part of ceremonial dress. Now chiefly historical.
(a) A breast ornament worked in gold sometimes worn by bishops over the chasuble during the celebration of mass (see quot. 1950). Now chiefly histo…