(Botany)a flowering plant with an embryo that bears a single cotyledon (seed leaf). Monocotyledons constitute the smaller of the two great divisions of flowering plants, and typically have elongated stalkless leaves with parallel veins (e.g. grasses, lilies, palms) (植)单子叶植物。 比较 dicotyledon
Class Monocotyledoneae (or -donae, -dones; sometimes Liliopsida), subdivision Angiospermae 单子叶植物纲,被子植物亚门