An Abbreviator

1. Agent noun of abbreviate; one who abbreviates or shortens. [Early 16th century.][1]
2. (historical, Roman Catholicism) One of a college of seventy-two officers of the papal court whose duty is to make a short minute of a decision on a petition, or reply of the pope to a letter, and afterwards expand the minute into official form. [Mid 16th century.][1]