Acclivity \Ac*cliv"i*ty\, n.; pl. {Acclivities}. [L. acclivitas,
fr. acclivis, acclivus, ascending; ad + clivus a hill, slope,
fr. root kli to lean. See {Lean}.]
A slope or inclination of the earth, as the side of a hill,
considered as ascending, in opposition to declivity, or
descending; an upward slope; ascent.
[1913 Webster]