Mid-Atlantic Ridge
— Noun
– English
~ a very long narrow elevation on the ocean floor that runs all the way from Iceland in the North Atlantic to Bouvet Island in the South Atlantic
moving ridge
— Noun
– English
~ one of a series of ridges that moves across the surface of a liquid (especially across a large body of water)
M-1 rifle
— Noun
– English
~ a semiautomatic rifle
Marconi rig
— Noun
– English
~ a rig of triangular sails for a yacht
modulus of rigidity
— Noun
– English
~ the coefficient of elasticity for a shearing force
mezzo-rilievo
— Noun
– English
~ a sculptural relief between low relief and high relief
mountain rimu
— Noun
– English
~ low-growing to prostrate shrub with slender trailing branches; New Zealand
mourning ring
— Noun
– English
~ a ring worn as a memorial to a dead person
Merrimack River
— Noun
– English
~ a river that rises in south central New Hampshire and flows through Concord and Manchester into Massachusetts and empties into the Atlantic Ocean
Metaurus River
— Noun
– English
~ a battle during the second Punic War (207 BC); Hannibal's brother Hasdrubal was defeated by the Romans which ended Hannibal's hopes for success in Italy
Mekong River
— Noun
– English
~ an Asian river; flows through a large delta in southern Vietnam into the South China Sea
Monongahela River
— Noun
– English
~ a river that rises in northern West Virginia and flows north into Pennsylvania where it joins the Allegheny River at Pittsburgh to form the Ohio River
Moreau River
— Noun
– English
~ a river that rises in western South Dakota and flows eastward to the Missouri River
Mohawk River
— Noun
– English
~ a river of central New York that flows southeastward to the Hudson River
Meuse River
— Noun
– English
~ an American operation in World War I (1918); American troops under Pershing drove back the German armies which were saved only by the armistice on November 11
Meuse River
— Noun
– English
~ a European river; flows into the North Sea
Milk River
— Noun
– English
~ a river that rises in the Rockies in northwestern Montana and flows eastward to become a tributary of the Missouri River
Mobile River
— Noun
– English
~ a river in southwestern Alabama; flows into Mobile Bay
Missouri River
— Noun
– English
~ the longest river in the United States; arises in Montana and flows southeastward to become a tributary of the Mississippi at Saint Louis; "The Missouri and Mississippi Rivers together form the third longest river in the world"