1) Pedant 2) Purist 
Precisionist (1981-2006) was an American Hall of Fame Thoroughbred racehorse. In 1985, Precisionist won the Strub Series at Santa Anita Park becoming only the fifth horse to win the Malibu Stakes, the San Fernando Stakes and the Charles H. Strub Stakes. Although he earned an Eclipse Award as a champion sprinter and Breeders` Cup sprint winner, Pr....
precisionist 1. Someone who insists on or strives for absolute precision. 2. Someone who values precision; a purist.