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Medici, Piero de', 1416–69, Italian merchant prince

(Encyclopedia)Medici, Piero de' dā mĕˈdĭchē, Ital. māˈdēchē [key], 1416–69, Italian merchant prince. He succeeded his father, Cosimo de' Medici, as head of the Medici family and as leader of the Florent...

Muhammad Zahir Shah

(Encyclopedia)Muhammad Zahir Shah zäˈhĕr shä [key], 1914–2007, last king of Afghanistan. In 1933 he became king after his father, Muhammad Nadir Shah, was assassinated. During his reign power was exercised ma...

Müller, Paul Hermann

(Encyclopedia)Müller, Paul Hermann mŭlˈər [key], 1899–1965, Swiss chemist, Ph.D. Univ. of Basel, 1925. He worked as a research scientist with J. R. Geigy A.G. in Basel, Switzerland. Muller won the 1948 Nobel...

Merian, Matthäus

(Encyclopedia)Merian, Matthäus māˈrēän [key], the elder, 1593–1650, Swiss engraver and draftsman. In Frankfurt am Main from c.1623, he produced, with help from assistants, numerous engravings of battles and...

acetone

(Encyclopedia)acetone prōˈpənōn [key], CH3COCH3, colorless, flammable liquid. Acetone melts at −94.8℃ and boils at 56.2℃. It is the simplest aliphatic ketone. Acetone is widely used in industry as a solve...

Lorenzo di Pietro

(Encyclopedia)Lorenzo di Pietro pyāˈtrō [key], c.1412–1480, Sienese painter, sculptor, and goldsmith, called Il Vecchietta. He painted a group of frescoes and a relic press in the hospital at Siena; four ceili...

Nicephorus II

(Encyclopedia)Nicephorus II (Nicephorus Phocas) fōˈkəs [key], c.912–969, Byzantine emperor (963–69). He was a successful general under Constantine VII and Romanus II. On Romanus' death (963) he married the e...

Navarrete, Martín Fernández de

(Encyclopedia)Navarrete, Martín Fernández de nävärāˈtā [key], 1765–1844, Spanish historian and hydrographer. Joining (1780) the Spanish navy, he entered (1796) the navy department and later established it...

María de Molina

(Encyclopedia)María de Molina dā mōlēˈnä [key], d. 1321, queen of Castile, consort of Sancho IV. As regent (1295–1301) for her son, Ferdinand IV, she defended his throne against several pretenders, who were...

Macleod, John James Rickard

(Encyclopedia)Macleod, John James Rickard məkloudˈ [key], 1876–1935, Scottish physiologist, educated at Aberdeen and Leipzig. He was a professor at Western Reserve Univ. (1903–18) and at the Univ. of Toronto...