Origin of armarium
< Latin: cupboard, safe, equivalent to arm(a) weapons, tools + -ārium -arium
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018
Examples from the Web for armarium
They would take the armarium that was in daily use, and adapt it to their own purposes.
I have placed the armarium at the end of the room, opposite the window.
"Armarium" was to called because it was originally a place for keeping arms.
As he had charge of the armarium or press for storing books, he was also sometimes styled armarius.Old English Libraries