Illustrated Companion to the Latin Dictionary/Commentaculum

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. 

COMMENTAC'ULUM or COMMOTAC'ULUM. A wand which the Roman priesthood carried in their sacrificial processions, wherewith to clear the way, and prevent the populace from closing too near upon them. Festus. s. v.