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Noun alder tree has 1 sense
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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