deciduous

adjective de·cid·u·ous \ di-ˈsi-jə-wəs , -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

deciduousness

noun

Examples of deciduous in a Sentence

  1. the bare branches of a deciduous tree in winter

  2. he chose not to fret about the deciduous discomforts of his existence

Recent Examples of deciduous from the Web

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.

Origin and Etymology of deciduous

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


DECIDUOUS Defined for English Language Learners

deciduous

adjective

Definition of deciduous for English Language Learners

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


DECIDUOUS Defined for Kids

deciduous

adjective de·cid·u·ous \ di-ˈsi-jə-wəs \

Definition of deciduous for Students

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

Medical Dictionary

deciduous

adjective de·cid·u·ous \ di-ˈsij-ə-wəs \

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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