Connoisseur (noun)
kon-uh-sur
a person who is especially competent to pass critical judgments in an art, particularly one of the fine arts, or in matters of taste.
First recorded in 1705–15 and comes from French, and ultimately from the Latin stem cognōscitōr-, “knower.”
Example sentences
“A connoisseur of fine cheeses, he could tell an authentic Parmigiano Reggiano just by smell.”