n. A tree, the only species of the genus Sassafras.n. [capitalized] [NL. (C. G. Nees, 1836).] A genus of apetalous trees of the order Laurineæ and tribe Litseaceæ, characterized by an umbel-like inflorescence of diœcious flowers in loose and short racemes from terminal buds, and produced around the base of the new growth of the season.n. Of New South Wales: Dorypha Sassafras of the same order, another large tree, with very fragrant leaves, and aromatic bark used in infusion as a tonic.n. Of Queensland: a smaller related tree, Daphnandra micrantha.n. A smaller related tree, Daphnandra micrantha, of the family Monimiaceæ.