A bicycle specially designed for off-road riding, typically with straight, flat handlebars, a heavier frame than road bikes, higher ground clearance, and wider tires, sometimes with knobs on them for greater traction.

(pathology) Rocky Mountain spotted fever

A subspecies of reindeer, found wild in southern Norway and Kola peninsula in Russia; Rangifer tarandus tarandus. A semi-domesticated variant is widely herded by the Sami in northern Scandinavia.

a range of mountains in Russia that stretch from the Arctic to the Caspian Sea; traditionally, the border between Europe and Asia

(geography) A series of adjoining mountains, often in a line.

A flowering evergreen shrub, Kalmia latifolia, in the family Ericaceae, native to the eastern United States, all parts of which are toxic, the state tree of Connecticut and Pennsylvania.

plural of mountain goat

The geological processes, such as tectonic plate movement and volcanic activity, by which mountains are formed.

Alternative spelling of mountainboarding

plural of mountain range