Hade /(hād)/

Hade

n.
  1. The descent of a hill. [Obs.]
  2. The inclination or deviation from the vertical of any mineral vein. (Mining)
  3. The deviation of a fault plane from the vertical. (Geol. & Mining)

Hade

v. i.
  1. To deviate from the vertical; -- said of a vein, fault, or lode. (Mining)