Webster’s Revised Unabridged Dictionary · 1913
Ciborium
Ci·bo′ri·um (sĭ·bō′rĭ·ŭm), n.: pl. Ciboria (#). [LL., fr. L. ciborium a cup, fr. Gr. κιβώριον a seed vessel of the Egyptian bean; also, a cup made from its largeleaves, or resembling its seed vessel in shape.] 1. (Arch.) A canopy usually standing free and supported on four columns, covering the high altar, or, very rarely, a secondary altar.
2. (R. C. Ch.) The coffer or case in which the host is kept; the pyx.