Citrullus vulgaris
n 1: an African melon [syn: {watermelon}, {watermelon vine},
{Citrullus vulgaris}]
Watermelon \Wa"ter*mel`on\, n. (Bot.)
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}.
[1913 Webster]