Source : Webster's Revised Unabridged Dictionary (1913)

Hade \Hade\, n. (Geol. & Mining)
   The deviation of a fault plane from the vertical.

   Note: The direction of the hade is the direction toward which
         the fault plane descends from an intersecting vertical
         line.

Hade \Hade\, n. [Cf. heald inclined, bowed down, G. halde
   declivity.]
   1. The descent of a hill. [Obs.]

   2. (Mining) The inclination or deviation from the vertical of
      any mineral vein.

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