Lir·i·o·den·dron n.; pl. Liriodendra   Bot. A genus of large and very beautiful trees of North America, having smooth, shining leaves, and handsome, tuliplike flowers; tulip tree; whitewood; -- called also canoewood. Liriodendron tulipifera is the only extant species, but there were several others in the Cretaceous epoch.
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  Liriodendron
       n : tulip trees [syn: genus Liriodendron]