ridge
The back of any animal; especially the upper or projecting part of the back of a quadruped.
Other meanings
Any extended protuberance; a projecting line or strip.
“The plough threw up ridges of earth between the furrows.”
The line along which two sloping surfaces meet which diverge towards the ground.
“mountain ridge”
Word history
From Old English "hryċġ" (back, spine, ridge, elevated surface).
Where this comes from
This definition is adapted from “ridge” on Wiktionary, by its contributors, published under CC BY-SA 4.0. This page is published under the same licence.