noun
native to Europe but introduced in America
• Syn: ↑grey alder, ↑Alnus incana
• Hypernyms: ↑alder, ↑alder tree
• Member Holonyms: ↑Alnus, ↑genus Alnus
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noun : an alder (Alnus incana) that is native to Europe but introduced into and often an escape in No. America and that has whitish gray bark and doubly toothed leaves with the undersurface whitish and often heavily pubescent
Useful english dictionary. 2012.