Definition: The Mass of Pope St. Pius V, often known simply as the Latin Mass, was promulgated on July 14, 1570, through the apostolic constitution Quo Primum, which standardized the traditional Latin Rite Mass. It was replaced by the Mass of Pope Paul VI in 1969.
Also Known As: the Traditional Latin Mass; the Tridentine Mass; the Tridentine Latin Mass; the Traditional Mass; the Old Mass; the Pre-Vatican II Mass
Examples:
"Pope Benedict XVI is expected to release a motu proprio allowing for a broader use of the Traditional Latin Mass, often known as the Tridentine Mass or the Mass of Pope St. Pius V."

