[ dih-sij-oo-uh s ]
/ dɪˈsɪdʒ u əs /


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.


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Pine and fir trees kept their green while their deciduous brothers were a riot of color. -- Crickett Starr, Violet Among the Roses



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Origin of deciduous

1650–60; < Latin dēciduus tending to fall, falling, equivalent to dēcid(ere) to fall off, down (dē- de- + -cidere, combining form of cadere to fall) + -uus deverbal adj. suffix; see -ous

OTHER WORDS FROM deciduous Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2020

Example sentences from the Web for deciduous

British Dictionary definitions for deciduous

/ (dɪˈsɪdjʊəs) /


(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)

Derived forms of deciduous

deciduously, adverbdeciduousness, noun

Word Origin for deciduous

C17: from Latin dēciduus falling off, from dēcidere to fall down, from cadere to fall
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Medical definitions for deciduous

[ dĭ-sĭjōō-əs ]


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.
The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.

Scientific definitions for deciduous

[ dĭ-sĭjōō-əs ]

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.
The American Heritage® Science Dictionary Copyright © 2011. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.