DECIDUOUS
deciduous
(adjective) (of plants and shrubs) shedding foliage at the end of the growing season
deciduous
(adjective) (of teeth, antlers, etc.) being shed at the end of a period of growth; “deciduous teeth”
Source: WordNet® 3.1
Etymology
Adjective
deciduous (not comparable)
(biology, anatomy) Describing a part that falls off, or is shed, at a particular time or stage of development.
Antonyms: persistent, permanent
(botany) Of or pertaining to trees which lose their leaves in winter or the dry season.
Antonyms: evergreen, sempervirent. Cf. caducous.
Transitory, ephemeral, not lasting.
Source: Wiktionary
De*cid"u*ous, a. Etym: [L. deciduus, fr. dec to fall off; de- +
cadere to fall. See Chance.] (Biol.)
Definition: Falling off, or subject to fall or be shed, at a certain
season, or a certain stage or interval of growth, as leaves (except
of evergreens) in autumn, or as parts of animals, such as hair,
teeth, antlers, etc.; also, shedding leaves or parts at certain
seasons, stages, or intervals; as, deciduous trees; the deciduous
membrane.
Source: Webster’s Unabridged Dictionary 1913 Edition