Ciborium

1. n. The coffer or case in which the host is kept; the pyx.
2. n. A canopy usually standing free and supported on four columns, covering the high altar, or, very rarely, a secondary altar.

The word meanings were obtained from OPTED(The Online Plain Text English Dictionary), which is based on “The Project Gutenberg Etext of Webster’s Unabridged Dictionary” which is in turn based on the 1913 US Webster’s Unabridged Dictionary (See Project Gutenburg), as a text file.