Monocotyledon, << `mon` uh `kot` uh LEE duhn, >> is a type of flowering plant that has one cotyledon (leafy structure within the plant’s seed). The leaves of most monocotyledons have parallel veins. The flower parts usually grow in multiples of three. About 40,000 species of plants are monocotyledons, including bananas, pineapples, and corn. See also Cotyledon .
