Illustrated Companion to the Latin Dictionary/Gregarius

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. 

GREGA'RIUS sc. miles. An orderly or common foot-soldier of the rank and file. (Cic. Planc. 30. Tac. Hist. v. 1.) Their accoutrements, of course, varied according to the class of troops to which they belonged, and whether Romans, allies, or auxiliaries.

2. Gregarius eques. A cavalry trooper below the rank of an officer. Tac. Hist. iii. 51.