1. seal consisting of a coating of a tar or rubberlike material on the underside of a motor vehicle to retard corrosion; [syn: undercoat, underseal]
WordNet (r) 3.0 (2006):
underseal
n 1: seal consisting of a coating of a tar or rubberlike
material on the underside of a motor vehicle to retard
corrosion [syn: undercoat, underseal]