noun, plural ac·cliv·i·ties.
Origin of acclivity
Examples from the Web for acclivitous
Herds of agile creatures like antelopes were seen in the moon, "abounding in the acclivitous glades of the woods."
Then herds of agile creatures like antelopes are described, 'abounding on the acclivitous glades of the woods.'Myths and Marvels of Astronomy|Richard A. Proctor
noun plural -ties
Word Origin for acclivity
1610s, from Latin acclivitatem (nominative acclivitas) "an ascending direction, an upward steepness," from acclivis "mounting upwards, ascending," from ad- "up" (see ad-) + clivus "hill, a slope," from PIE *klei-wo-, suffixed form of *klei- "to lean" (see lean (v.)).