- the angle between a fault plane and the vertical, measured perpendicular to the strike of the fault; complement of the dip.
- the inclination of a vein or seam from the vertical.
- (of a fault, vein, or seam) to incline from a vertical position.
- the angle made to the vertical by the plane of a fault or vein
- (of faults or veins) to incline from the vertical
