What is the meaning of Sassafras?

A tree of species Sassafras albidum of the eastern United States and Asia having mitten-shaped leaves and red, aromatic heartwood.

A tree of any species in the genus Sassafras.

The bark of the root of this plant, used for medicinal and (mostly historically) culinary purposes and formerly a main ingredient in root beer.

sassafras (tree of the genus Sassafras; its bark)

Source: wiktionary.org