Word Study
watermelon
CIDE DICTIONARY
watermelon, n.
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]
For further exploring for "watermelon" in Webster Dictionary Online