Illustrated Companion to the Latin Dictionary/Hippopera

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. 

HIPPOPE'RA (ἱπποπήρα). A saddle-bag for travellers on horseback, but used in pairs, so that the plural number is applied when the equipage of a single person only is referred to. Sen. Ep. 87.