Deciduous

(-sid'yu-ŭs.) [From L. deciduus, that falls off.] (Bot.) Finally falling off. D. leaves are those which fall in autumn, in distinction from those of evergreens. The calyx or cup of af lower is said to be D. when it falls off or decays along with the flower petals; while, on the contrary, it is called permanent when it remains after these are fallen. [s. 269]