Illustrated Companion to the Latin Dictionary/Dividiculum

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. 

DIVIDIC'ULUM. A tower in an aqueduct, containing a large reservoir, from which the water was distributed through separate pipes into the city. It was an old name, subsequently relinquished for the more imposing one of Castellum. Festus, s. v. and CASTELLUM, 4., where an illustration is given.