hogback(n = noun.object) horseback - a narrow ridge of hills;
is a kind of ridge, ridgeline
1. An upward curve or very obtuse angle in the upper surface of any member, as of a timber laid horizontally; -- the opposite of
2. See Hogframe. [1913 Webster]
3. A ridge formed by tilted strata; hence, any ridge with a sharp summit, and steeply sloping sides. [1913 Webster]
hogback, n. (also hog's back) a steep-sided ridge of a hill.