de·​cid·​u·​ous | \ di-ˈsi-jə-wəs How to pronounce deciduous (audio) , -jü-əs\

Definition of deciduous

1 biology : falling off or shed seasonally or at a certain stage of development in the life cycle deciduous leaves deciduous scales

2 biology

a : having deciduous parts maples, birches, and other deciduous trees deciduous dentition
b : having the dominant plants deciduous a deciduous forest
3 : ephemeral There is much that is deciduous in books …— J. R. Lowell

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Other Words from deciduous

deciduousness noun

Examples of deciduous in a Sentence

the bare branches of a deciduous tree in winter he chose not to fret about the deciduous discomforts of his existence

Recent Examples on the Web

Moringa is a fast-growing, deciduous or evergreen tree. Nan Sterman,, "Branching out with new crops," 31 May 2018 Preference is a flowering deciduous bush that takes shade and is low-maintenance. Ellen Nibali,, "Garden Q&A: This Fourth of July, think about choosing a native plant," 28 June 2018 Both of these cypresses are deciduous and drop all of their leaves in the winter. Dan Gill,, "Do all bald cypress trees develop knees?," 31 Mar. 2018 When days begin to grow shorter, deciduous (green leafy) trees start signaling their leaves to stop producing chlorophyll, the green pigment responsible for the leaves’ color and photosynthesis. Brian Resnick, Vox, "When and where fall foliage colors will peak, in one map," 13 Oct. 2018 Unlike the native Southern magnolia (Magnolia grandiflora), the Japanese magnolia is deciduous and drops its leaves in winter., "Japanese magnolias: How to choose, plant and care for these spring-flowering beauties," 3 Mar. 2018 Images of trees in the four seasons’ deciduous stages lie between the points, and a line of homes encircles the compass’ center. Sven Berg, The Seattle Times, "Heat, water and trucks are destroying a Boise mosaic," 9 July 2018 Most of the stops are in open country, but a few give opportunities to record birds typical of moist deciduous woodlands and stream-side habitat. Taylor Piephoff, charlotteobserver, "Breeding Bird Survey yields 56 species over 25-mile route," 20 June 2018 Leaves of deciduous trees were fully unfolded, gorgeous neon green and not yet stenciled by insects. Ned Rozell, Anchorage Daily News, "What it’s like to run circles for 24 hours around the land of no night," 9 June 2018

These example sentences are selected automatically from various online news sources to reflect current usage of the word 'deciduous.' Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.

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First Known Use of deciduous

1657, in the meaning defined at sense 1

History and Etymology for deciduous

Latin deciduus, from decidere to fall off, from de- + cadere to fall — more at chance

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Statistics for deciduous

Last Updated

2 May 2019

Look-up Popularity

Time Traveler for deciduous

The first known use of deciduous was in 1657

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More Definitions for deciduous



English Language Learners Definition of deciduous

of a tree, bush, etc. : having leaves that fall off every year


de·​cid·​u·​ous | \ di-ˈsi-jə-wəs How to pronounce deciduous (audio) \

Kids Definition of deciduous

: made up of or having a part that falls off at the end of a period of growth and use deciduous trees


de·​cid·​u·​ous | \ di-ˈsij-ə-wəs How to pronounce deciduous (audio) \

Medical Definition of deciduous

1 : falling off or shed at a certain stage in the life cycle
2 : having deciduous parts a deciduous dentition

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More from Merriam-Webster on deciduous

Thesaurus: All synonyms and antonyms for deciduous

Spanish Central: Translation of deciduous

Nglish: Translation of deciduous for Spanish Speakers

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