A number of landforms in various places with this name. / A census-designated place in Orange County, Florida. / A village in Morehouse Parish, Louisiana.

(dentistry) A ridge on the masticatory surface of an upper molar tooth extending from the mesiolingual to the distobuccal cusp.

plural of oblique ridge

(geodynamics, tectonics) A proposed driving force for plate motion in plate tectonics that occurs at mid-ocean ridges as the result of the rigid lithosphere sliding down the hot, raised asthenosphere below mid-ocean ridges.

(geology) a mid-ocean ridge

(geology, oceanography) any of an interconnected system of broad submarine rises formed by plate tectonics

(embryology) A formation of ectodermal cells that occurs at the distal end of each limb bud and functions as the primary signaling point to secure the proper development of a limb.

plural of apical ectodermal ridge

plural of mid-oceanic ridge

plural of mid-ocean ridge