RIDGE Copy link • RIDGEEarth thrown up by the plough, porca (earth between narrow furrows): lira (earth between wide furrows). The top of a mountain or hill, dorsum, jugum, montis (Caes., Liv.; ☞ not tergum collis or montis, which means the back or hinder part of a hill or mountain). A line or chain of mountains, continuum montium jugum (Tac., Germ., 47); continuum montium dorsum (Liv., 41, 18); montes continui (Hor. Ep.), perpetui (Liv.): juga velut serie cohaerentia (Curt., 7, 3, 21); perpetuo jugo juncti colles (Mela, 1, 5, 3); jugum, quod montes perpetuo dorso inter se jungit (Liv., 41, 18); continuatio seriesque montium (after Cic.; Vid: Herzog, ad Caes., B.G., 7, 44).