Deciduous

In biology, falling off. Applied to leaves that fall in autumn, and to the calyx and corolla when they fall off before the fruit develops. In dental anatomy, applied to the milk-teeth or temporary teeth. D. Skin. See Keratolysis . D. Teeth, the temporary teeth or milk-teeth are so called because, after subserving the purposes of early childhood, they are removed by an operation of the economy, to give place to others of a larger size and of a more solid texture. See Teeth, Temporary.