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la·bur·num | \ lə-ˈbər-nəm 
\
\Definition of laburnum
: any of a small genus (Laburnum, especially L. anagyroides) of poisonous leguminous shrubs and trees of Eurasia with pendulous racemes of bright yellow flowers
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Time Traveler for laburnum
The first known use of laburnum was in 1567
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