Al·der n. Bot. A tree, usually growing in moist land, and belonging to the genus Alnus. The wood is used by turners, etc.; the bark by dyers and tanners. In the U. S. the species of alder are usually shrubs or small trees.
Black alder. (a) A European shrub (Rhamnus frangula); Alder buckthorn. (b) An American species of holly (Ilex verticillata), bearing red berries.
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Fran·gu·lic Fran·gu·lin·ic, a. Chem. Pertaining to, or drived from, frangulin, or a species (Rhamnus Frangula) of the buckthorn.
Frangulinic acid Chem., a yellow crystalline substance, resembling alizarin, and obtained by the decomposition of frangulin.
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Fran·gu·lin n. Chem. A yellow crystalline dyestuff, regarded as a glucoside, extracted from a species (Rhamnus Frangula) of the buckthorn; -- called also rhamnoxanthin.
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Rhamnus frangula
n : small tree common in Europe [syn: alder buckthorn, alder
dogwood]