Nuts are hard, dry, single-seeded fruits which do not open at maturity. Nuts provide nourishment for any animals that are able to open the shells. Many fruits are called nuts, even though biologists would not classify them as such.
Kola Nut, an edible nut of the kola tree, an evergreen native to Africa. (Botanically, it is not a true nut, but rather the kernel of a fruit called a drupe.) The nut is creamy white and about one inch (2.5 cm) long. See more »