Meyer lemons are a type of citrus fruit native to China, a cross between a citron (an "original" lemon) and a mandarin/pomelo hybrid. They were introduced to the United States in the early 20th century by a man named Frank Nicholas Meyer, after whom they are named.
Compared to the common lemon (citrus limon), Meyer lemons are smaller and more round, with a deep yellow to orange skin and dark yellow pulp. They have thinner, smoother skin and are less acidic, which makes them sweeter than their more tart counterparts.
Meyer lemons have a unique aroma that is often described as a spicy bergamot fragrance. They are highly prized by cooks and bakers because of their slightly sweet and intensely citrusy flavor. Meyer lemons can be used in a wide variety of dishes, including desserts, cocktails, and savory recipes, where they can often replace regular lemons to add a different taste profile.