1. Bitume.
2. Macadam.
A viscous, sticky substance obtained from the distillation of wood, coal, or peat; used for waterproofing.
Dark brown or black viscous liquid obtained by the destructive distillation of coal, shale, and wood. Tars consist of a mixture of hydrocarbons, acids, and bases. Creosote and paraffin are produced from wood tar. See also coal tar.