Lewis Short
armāriŏlum (noun N) : dim.armarium
* A little chest, or casket (ante- and post-class.): armariola Graeca,Plaut. Truc. 1, 1, 35.—A small cabinet, a bookcase, Sid. Ep. 8, 16; Hier. ad Matth. 3, 21.
Charlton T. Lewis, Charles Short, A Latin Dictionary