Deciduous

deciduous
    adj 1: (of plants and shrubs) shedding foliage at the end of the
           growing season [ant: {evergreen}]
    2: (of teeth, antlers, etc.) being shed at the end of a period
       of growth; "deciduous teeth"
    

Deciduous \De*cid"u*ous\ (?; 135), a. [L. deciduus, fr. dec?dere
   to fall off; de- + cadere to fall. See {Chance}.] (Biol.)
   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.
   [1913 Webster]
    

95 Moby Thesaurus words for "deciduous":
      arborary, arboreal, arboreous, arborescent, arboresque, arborical,
      arboriform, brittle, bushlike, bushy, capricious, changeable,
      citrous, collapsing, coniferous, corruptible, declining,
      declivitous, decurrent, dendriform, dendritic, dendroid,
      descendant, descending, down, down-reaching, downcoming,
      downfalling, downgoing, downhill, downsinking, downward, drooping,
      dropping, dying, ephemeral, evanescent, evergreen, fading, falling,
      fickle, fleeting, flitting, fly-by-night, flying, fragile, frail,
      fugacious, fugitive, half-hardy, hardwood, hardy, impermanent,
      impetuous, impulsive, inconstant, insubstantial, momentary, mortal,
      mutable, nondeciduous, nondurable, nonpermanent, on the descendant,
      on the downgrade, passing, perennial, perishable, piny, plummeting,
      plunging, sagging, scrubbly, scrubby, scrublike, setting,
      short-lived, shrubby, shrublike, sinking, softwood, submerging,
      subsiding, temporal, temporary, tottering, transient, transitive,
      transitory, treelike, tumbledown, undurable, unenduring, unstable,
      volatile