connoisseur

/ˌkɑnəˈsɜr/
noun
  1. A person who has expert knowledge and appreciation of something, especially in the arts, food, or drink.
    • As a coffee connoisseur, he only drinks single-origin beans brewed at the perfect temperature.
    • My uncle is a connoisseur of fine wines and can identify the grape just by tasting it.
    • She is a connoisseur of modern art and visits galleries every weekend.
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