noun
common shrub of Canada and northeastern United States having shoots scattered with rust-colored down
• Syn: ↑Alnus rugosa
• Hypernyms: ↑alder, ↑alder tree
• Member Holonyms: ↑Alnus, ↑genus Alnus
* * *
noun : a common shrub (Alnus rugosa) of the north temperate zone with oval leaves and catkins that flower much before the leaves expand
Useful english dictionary. 2012.