Noun | 1. | ![]() alder tree, alder - north temperate shrubs or trees having toothed leaves and conelike fruit; bark is used in tanning and dyeing and the wood is rot-resistant wood - the hard fibrous lignified substance under the bark of trees |
2. | ![]() Alnus, genus Alnus - alders alder - wood of any of various alder trees; resistant to underwater rot; used for bridges etc Alnus glutinosa, Alnus vulgaris, common alder, European black alder - medium-sized tree with brown-black bark and woody fruiting catkins; leaves are hairy beneath Alnus maritima, seaside alder - shrub or small tree of southeastern United States having soft light brown wood Alnus rubra, Oregon alder, red alder - large tree of Pacific coast of North America having hard red wood much used for furniture Alnus rugosa, speckled alder - common shrub of Canada and northeastern United States having shoots scattered with rust-colored down Alnus serrulata, hazel alder, smooth alder - common shrub of the eastern United States with smooth bark Alnus veridis, green alder - shrub of mountainous areas of Europe Alnus crispa, Alnus veridis crispa, green alder - North American shrub with light green leaves and winged nuts tree - a tall perennial woody plant having a main trunk and branches forming a distinct elevated crown; includes both gymnosperms and angiosperms |