(n.) A raised shelf or stand on the back of an altar, on which different objects can be placed; a predella or gradino.

Communion table altar carpet altar desk altar facing altar of prothesis altar rail altar side altar slab altar stair altar stone altarpiece ancona bomos chancel table credence eschara frontal gradin hestia holy table mensal missal stand predella prothesis retable retablo rood altar scrobis superaltar