Illustrated Companion to the Latin Dictionary/Trigarium

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. 

TRIGA'RIUM. A place or enclosure for the exercise of trigae, or of horses and cars in general. (Plin. H. N. xxxvii. 77.) There were several driving courses of this description in the city of Rome, which are enumerated by P. Victor.