from
WordNet (r) 3.0 (2006)
acclivity
n 1: an upward slope or grade (as in a road); "the car couldn't
make it up the rise" [syn: {ascent}, {acclivity}, {rise},
{raise}, {climb}, {upgrade}] [ant: {declension},
{declination}, {decline}, {declivity}, {descent},
{downslope}, {fall}]
from
The Collaborative International Dictionary of English v.0.48
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]