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Mayo, Henry Thomas

(Encyclopedia)Mayo, Henry Thomas, 1856–1937, American naval officer, b. Burlington, Vt. In 1913 he became commander of the Atlantic Fleet. At Tampico in 1914 he precipitated an international incident by demanding...

M'Bour

(Encyclopedia)M'Bour əmbo͞orˈ [key], town, W Senegal, on the Atlantic Ocean. Ilmenite, rutile, and yirconium are extracted from the titanium ore mined nearby. M'Bour also processes and trades peanuts grown in th...

measles

(Encyclopedia)measles or rubeola ro͞obēˈələ [key], highly contagious disease typically contracted during childhood, caused by a filterable virus and spread by droplet spray from the nose, mouth, and throat of ...

measurement

(Encyclopedia)measurement, determination of the magnitude of a quantity by comparison with a standard for that quantity. Quantities frequently measured include time, length, area, volume, pressure, mass, force, and...

mechanized warfare

(Encyclopedia)mechanized warfare, employment of modern mobile attack and defense tactics that depend upon machines, more particularly upon vehicles powered by gasoline and diesel engines. Central to the waging of m...

mediation

(Encyclopedia)mediation, in law, type of intervention in which the disputing parties accept the offer of a third party to recommend a solution for their controversy. Mediation has long been a part of international ...

Medici, Alessandro de'

(Encyclopedia)Medici, Alessandro de' mĕˈdĭchē, Ital. māˈdēchē [key], 1510?–37, duke of Florence (1532–37); probably an illegitimate son of Lorenzo de' Medici, duke of Urbino. His prominence began when ...

Medici, Cosimo I de'

(Encyclopedia)Medici, Cosimo I de', 1519–74, duke of Florence (1537–69), grand duke of Tuscany (1569–74); son of Giovanni de' Medici (Giovanni delle Bande Nere). In 1537, Lorenzino de' Medici murdered Cosimo'...

Medici, Lorenzo de', 1449–92, Italian merchant prince

(Encyclopedia)Medici, Lorenzo de' dā mĕˈdĭchē, Ital. māˈdēchē [key], 1449–92, Italian merchant prince, called Lorenzo il Magnifico [the magnificent]. He succeeded (1469) his father, Piero de' Medici, as...

medicine

(Encyclopedia)medicine, the science and art of treating and preventing disease. Modern medicine, characterized by growing specialization and a complex diagnostic and therapeutic technology, faces problems in the...