Illustrated Companion to the Latin Dictionary/Clostrum

This article incorporates text from a publication now in the public domain: Rich, Anthony (1849). The illustrated companion to the Latin dictionary, and Greek lexicon. p. vi. OCLC 894670115. https://archive.org/details/illustratedcompa00rich. 

CLOSTRUM. For CLAUSTRUM. In a general sense, any fastening like a lock (Cato, R. R. xiii. 3. Id. CXXXV. 2.); but, more definitively, the box into which a lock shoots. Senec. Ben. vii. 21.