- shedding the leaves annually, as certain trees and shrubs.
- falling off or shed at a particular season, stage of growth, etc., as leaves, horns, or teeth.
- not permanent; transitory.
- (of trees and shrubs) shedding all leaves annually at the end of the growing season and then having a dormant period without leavesCompare evergreen (def. 1)
- (of antlers, wings, teeth, etc) being shed at the end of a period of growth
- rare impermanent; transitoryCompare evergreen (def. 2)
1680s, from Latin deciduus “that which falls off,” from decidere “to fall off,” from de- “down” (see de-) + cadere “to fall” (see case (n.1)). Originally with reference to leaves, petals, teeth, etc.; specific sense of “trees whose leaves fall off” (opposed to evergreen) is from 1778.
- Falling off or shed at a specific stage of growth, as teeth of the first dentition.
- Of, relating to, or being the first or primary dentition.
- Shedding leaves at the end of a growing season and regrowing them at the beginning of the next growing season. Most deciduous plants bear flowers and have woody stems and broad rather than needlelike leaves. Maples, oaks, elms, and aspens are deciduous. Compare evergreen. See more at abscission.
- Falling off or shed at a particular season or stage of growth, as antlers.