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

They are often found in meadows, grasslands, chaparral and deciduous and coniferous forests. Rebecca Jepsen, The Mercury News, "Love ’em or hate ’em, snakes are good for your garden," 12 June 2019 The outage occurred because a large deciduous tree fell completely across three power lines at 25th Avenue East and East Harrison Street, Seattle City Light spokesman Scott Thomsen said. Christine Clarridge, The Seattle Times, "Tree knocks out power to 4,000 Seattle residents Friday morning," 16 Aug. 2019 Every fall, the leaves of deciduous trees undergo a dramatic color change before forfeiting their newfound hues, fading to brown and dying. Emily Toomey, Smithsonian, "Watch Leaves Change Color in a Matter of Seconds," 14 Aug. 2019 Summer hubbub is over, the powder’s yet to fly, and the deciduous trees are ablaze. Outside Online, "The Best Places to Savor Fall in British Columbia," 14 Aug. 2019 Older conifers are losing ground to younger deciduous trees, altering whole ecosystems. Nancy Fresco, The Conversation, "Huge wildfires in the Arctic and far North send a planetary warning," 14 Aug. 2019 Evergreens generally are used for topiary, but occasionally a deciduous plant such as English hawthorn or European beech is used. Washington Post, "Topiary tips: When you want shrubs to double as sculpture," 30 July 2019 Commonly known as Honeyberry, this deciduous shrub’s elongated dark blue berries contain considerably more antioxidants and three times the vitamin C than found in blueberries. Earl Nickel,, "Heavenly honeysuckle has 180 species, and one will be right for you," 26 July 2019 Giving its name to a district, the forest proper is spread over roughly 16 deciduous miles, beginning on the edge of London’s Forest Gate. Simon Ingram, National Geographic, "Visit the world’s first National Park City," 26 July 2019

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

3 Oct 2019

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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

Comments on deciduous

What made you want to look up deciduous? Please tell us where you read or heard it (including the quote, if possible).


to wander slowly or to speak indistinctly

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