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Definition of AILANTHUS
: any of a small Asian genus (Ailanthus of the family Simaroubaceae, the ailanthus family) of chiefly tropical trees and shrubs with bitter bark, pinnate leaves, and terminal panicles of ill-scented greenish flowers; especially:tree of heaven
New Latin, from Kamarian (Austronesian language of the Piru Bay region, Seram) ai lanito, literally, the sky tree, or from a cognate phrase in a related central Moluccan language
First Known Use: 1789
noun\ā-ˈlan(t)-thəs, ī-\(Medical Dictionary)
Medical Definition of AILANTHUS
capitalized: a small genus of chiefly tropical Asian trees and shrubs (family Simaroubaceae) with bitter bark, pinnate leaves, and terminal panicles of ill-scented greenish flowers; especially:tree of heaven
: a tree of the genus Ailanthus
Any of the flowering plants that make up the genus Ailanthus, in the quassia family (Simaroubaceae), native to eastern and southern Asia and northern Australia and naturalized in subtropical and temperate regions elsewhere. Ailanthus leaves alternate along the stem and are composed of multiple leaflets arranged along an axis. The most familiar species is the tree of heaven.