ciborium

UK: /sɪˈbɔːrɪəm/ US: (si bôr′ē əm, -bōr′-)

Inflections of 'ciborium' (n): npl: ciboria

WordReference Random House Unabridged Dictionary of American English © 2025

ci•bo•ri•um  (si bôr′ē əm, -bōr′-), n., pl. -bo•ri•a 

(-bôr′ē ə, -bōr′-). 
1. Religion a permanent canopy placed over an altar;
   baldachin.
2. Religion any container designed to hold the consecrated bread or sacred wafers for the Eucharist.
3. Religion [Archaic.] a severy.

• Greek kibó̄rion literally, the seed vessel of the Egyptian lotus, which the cup apparently resembled
• Latin: drinking-cup
• 1645–55

Collins Concise English Dictionary © HarperCollins Publishers::

ciborium / sɪˈbɔːrɪəm/ noun ( -ria / -rɪə/)

1. a goblet-shaped lidded vessel used to hold consecrated wafers in Holy Communion
2. a freestanding canopy fixed over an altar and supported by four pillars

Etymology: 17th Century: from Medieval Latin, from Latin: drinking cup, from Greek kibōrion cup-shaped seed vessel of the Egyptian lotus, hence, a cup