Grapefruit, or Pomelo, a large, subtropical citrus fruit. The name grapefruit comes from the fact that the fruit grows in grapelike clusters. An important source of vitamin C, grapefruit is widely used in salads and as breakfast fruit and juice.

GrapefruitGrapefruit is a large, round citrus fruit with tart flesh and yellow, pink, or red skin.

The grapefruit tree is an evergreen that may grow 50 feet (15 m) high, but is usually pruned to about half that height. The large, white flowers grow in clusters near the stems of the glossy, oval leaves. The spherical fruit has yellow, pink, or red flesh and skin. The skin, which has a bitter taste, contains numerous tiny oil glands. The inside of the fruit contains wedge-shaped sections much like those of an orange; there may be many seeds or no seeds at all.

Grapefruit trees are usually started by budding on hardy seedling rootstocks of the sour orange. Both yellow- and pink-fleshed varieties of grapefruit are grown. The United States produces about two-thirds of the world's supply. Florida is by far the largest producer. California and Arizona also grow considerable quantities.

The grapefruit is Citrus paradisi of the rue (or orange) family, Rutaceae.