Citrus × meyeri, the Meyer lemon, is a hybrid citrus fruit native to China. It is a cross between a citron and a mandarin/pomelo hybrid distinct from the common or bitter oranges.

Mature trees are around 6 to 10 ft (2 to 3 m) tall with dark green shiny leaves. Flowers are white with a purple base and fragrant. The fruit is rounder than a true lemon, deep yellow with a slight orange tint when ripe, and has a sweeter, less acidic flavor.

Citrus × meyeri trees are around 6 to 10 ft (2 to 3 m) tall at maturity, though they can be pruned smaller. Their leaves are dark green and shiny. The flowers are white with a purple base and fragrant.

The Meyer lemon fruit is yellow and rounder than a true lemon. The skin is fragrant and thin, coloured a deep yellow with a slight orange tint when ripe. Meyer lemon fruits have a sweeter, less acidic flavour than the more common Lisbon or Eureka supermarket lemon varieties. The pulp is a dark yellow and contains up to 10 seeds per fruit.

The Meyer lemon is popular as an ornamental plant for its compact size, hardiness and productivity. It is decorative and suitable for container growing. The tree is reasonably hardy and grows well in warm climates. It is fairly vigorous, with a plant grown from seed usually beginning to fruit in four years yielding thousands of lemons over its lifetime. While fruit is produced throughout the year, the majority of the crop is harvest-ready in winter. Trees require adequate water, but less in the winter. For maximum yield, they should be fertilized during growing periods. New branches are thorny to protect the young shoots.