The very large ovoid or roundish fruit of a cucurbitaceous plant (Citrullus vulgaris) of many varieties; also, the plant itself. The fruit sometimes weighs many pounds; its pulp is usually pink in color, and full of a sweet watery juice. It is a native of tropical Africa, but is now cultivated in many countries. See Illust. of Melon.
- An African vine (Citrullus lanatus) cultivated for its large edible fruit.
- The fruit of this plant, having a hard green rind and sweet watery pink or reddish flesh.