Noun alder tree has 1 sense
  1. alder, alder tree - north temperate shrubs or trees having toothed leaves and conelike fruit; bark is used in tanning and dyeing and the rot-resistant wood
    --1 is a kind of tree
    --1 is a member of Alnus, genus Alnus
    --1 has substances: alder
    --1 has particulars:
     common alder, European black alder, Alnus glutinosa, Alnus vulgaris; gray alder, Alnus incana; seaside alder, Alnus maritima; white alder, mountain alder, Alnus rhombifolia; red alder, Oregon alder, Alnus rubra; speckled alder, Alnus rugosa; smooth alder, hazel alder, Alnus serrulata; green alder, Alnus veridis; green alder, Alnus veridis crispa, Alnus crispa
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