Also found in: Thesaurus, Medical, Legal, Encyclopedia, Wikipedia.


1. Shedding or losing foliage at the end of the growing season: deciduous trees.
2. Falling off or shed at a specific season or stage of growth: deciduous antlers; deciduous leaves.
3. Of or relating to the primary teeth.

[From Latin dēciduus, from dēcidere, to fall off : dē-, de- + cadere, to fall; see kad- in Indo-European roots.]

de·cid′u·ous·ly adv.
de·cid′u·ous·ness n.
Mentioned in ?
References in periodicals archive ?
In most cases, deciduousness developed as an adaptation not to cold, but to dryness.
On the differential advantages of evergreenness and deciduousness in Mediterranean oak woodlands: A flux perspective.