[1] : The Collaborative International Dictionary of English v.0.48

alder \al"der\ addl"d~er, aller \al"ler\ addl"l~er,
   a. from ealra, alra, gen. pl. of as. eal. the d is
   excrescent.
   of all; -- used in composition; as, alderbest, best of all,
   alderwisest, wisest of all. obs. --chaucer.
   1913 webster alderfly

[2] : The Collaborative International Dictionary of English v.0.48

alder \al"der\ addl"d~er, n. oe. aldir, aller, fr. as.
   alr, aler, alor, akin to d. els, g. erle, icel. erlir, erli,
   swed. al, dan. elle, el, l. alnus, and e. elm. 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.
   1913 webster

   black alder.
   a a european shrub rhamnus frangula; alder buckthorn.
   b an american species of holly ilex verticillata,
       bearing red berries.
       1913 webster alder
see also:
alnus black alder rhamnus frangula ilex verticillata 

[3] : WordNet (r) 2.0

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
see also:
alder tree 

[4] : U.S. Gazetteer Places (2000)

alder, mt -- u.s. census designated place in montana
   population 2000:    116
   housing units 2000: 69
   land area 2000:     2.013323 sq. miles 5.214482 sq. km
   water area 2000:    0.000000 sq. miles 0.000000 sq. km
   total area 2000:    2.013323 sq. miles 5.214482 sq. km
   fips code:            00850
   located within:       montana mt, fips 30
   location:             45.324531 n, 112.108035 w
   zip codes 1990:    
   note: some zip codes may be omitted esp. for suburbs.
   headwords:
    alder, mt
    alder

Alder >> A Words
Alder, definition of term: Alder
alder_pag1.html

Alder Tree >> A Words
Alder Tree, definition of term: Alder Tree
alder+tree_pag1.html