al·der /ˈɔldɚ/
 赤楊
 Al·der Al·ler a.  Of all; -- used in composition; as, alderbest, best of all, alderwisest, wisest of all. [Obs.]
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 Al·der n.  Bot. A tree, usually growing in moist land, and belonging to the genus Alnus. The wood is used by turners, etc.; the bark by dyers and tanners.  In the U. S. the species of alder are usually shrubs or small trees.
 Black alder. (a) A European shrub (Rhamnus frangula); Alder buckthorn. (b) An American species of holly (Ilex verticillata), bearing red berries.
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 alder
      n 1: wood of any of various alder trees; resistant to underwater
           rot; used for bridges etc
      2: north temperate shrubs or trees having toothed leaves and
         conelike fruit; bark is used in tanning and dyeing and the
         rot-resistant wood [syn: alder tree]