Definition of deciduous in English:

Share this entry


Pronunciation: /dɪˈsɪdjʊəs/


1(Of a tree or shrub) shedding its leaves annually: sun-loving deciduous trees like aspen Often contrasted with evergreen.
More example sentences
  • For a short while, as the leaves turn on deciduous trees and shrubs, autumn colours command the stage.
  • Evergreen trees, including many conifers, support more leaf area than deciduous trees in the same environment.
  • Most of the deciduous trees have shed their leaves by mid-December.
1.1 informal (Of a tree or shrub) broadleaved.
1.2Denoting the milk teeth of a mammal, which are shed after a time: this is the period when the deciduous teeth are being shed
More example sentences
  • The first teeth (also known as milk teeth or deciduous teeth) normally start to break through the gum from at around six to nine months old.
  • However, the rate of wear in the deciduous teeth seems more or less linear, suggesting a systematic error in the age estimates of the juveniles.
  • They did not explain why adult feeding behavior could not be achieved with a smaller deciduous dentition.



Example sentences
  • Best grown in bright conditions and it will tolerate a slight frost when it will behave deciduously.
  • As we pass Glenhead, we can think of writers such as McCormick and Cockett and savour the solitude offered by this deciduously wooded glade.
  • In the end, the climate defeated them and all, or most, of the trees behaved, and still behave, deciduously.


Example sentences
  • Winters were long and dark in those days and trees needed to have mechanisms to survive… so deciduousness in those conditions was a real benefit.
  • Overall light absorption by the whole canopy remains high despite deciduousness in the overstorey.
  • The flooded area had greater deciduousness because it has a proportionally greater number of totally or partially deciduous species.


Late 17th century: from Latin deciduus (from decidere 'fall down or off') + -ous.

Words that rhyme with deciduous


For editors and proofreaders

Line breaks: de¦cidu|ous

Share this entry

What do you find interesting about this word or phrase?

Comments that don't adhere to our Community Guidelines may be moderated or removed.