Illustrated Companion to the Latin Dictionary/Hydraula

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. 

HYDRAU'LA and HYDRAU'LES (ὑδραύλης). One who sings or recites to an accompaniment upon the hydraulic organ. Pet. Sat. 36. 6. Suet. Nero, 54.