Laburnum definitions

lə-bûr'nəm
Any of several poisonous trees or shrubs of the genus Laburnum of the pea family, especially L. anagyroides, which is cultivated for its drooping clusters of yellow flowers.
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Any of a genus (Laburnum) of small, poisonous trees and shrubs of the pea family, with three-part leaves and drooping racemes of yellow flowers.
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Any tree of genus Laburnum, which have bright yellow flowers and are poisonous.
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A taxonomic genus within the tribe Genisteaelaburnums, the golden chains.
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Origin of laburnum

New Latin Laburnum genus name from Latin laburnum broad-leaved bean-trefoil perhaps of Etruscan origin