(Mining) The inclination or deviation from the vertical of any mineral vein.
3.
(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.
... 52. 'I hade a sone, forsoth, Robyn, That shulde have ben myn ayre, Whanne he was twenty wynter olde, In ... — Ballads of Robin Hood and other Outlaws - Popular Ballads of the Olden Times - Fourth Series • Frank Sidgwick