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Ferdinand II, Holy Roman emperor

(Encyclopedia)Ferdinand II, 1578–1637, Holy Roman emperor (1619–37), king of Bohemia (1617–37) and of Hungary (1618–37); successor of Holy Roman Emperor Matthias. Grandson of Ferdinand I, son of Archduke Ch...

stellar populations

(Encyclopedia)stellar populations, two broadly contrasting distributions of star types that are characteristic of different parts of a galaxy. Population I stars are young, recently formed stars, whereas population...

Vesuvius

(Encyclopedia)Vesuvius vəso͞oˈvēəs [key], Ital. Vesuvio, active volcano, S Italy, on the eastern shore of the Bay of Naples, SE of Naples. The only other active volcano on the European mainland is the Campi Fl...

Kissinger, Henry Alfred

(Encyclopedia)Kissinger, Henry Alfred kĭsˈənjər [key], 1923–2023, American political scientist and U.S. secretary ...

Vietnam Veterans Memorial

(Encyclopedia)Vietnam Veterans Memorial, war memorial in Washington, D.C., built 1982. Designed by the American sculptor and architect Maya Ying Lin, it is a sloping, V-shaped, 493-ft (150-m) wall of highly polishe...

Villars, Claude Louis Hector, duc de

(Encyclopedia)Villars, Claude Louis Hector, duc de klōd lwē ĕktôrˈ dük də vēlärˈ [key], 1653–1734, marshal of France, the last of the great generals of Louis XIV. He fought in the Dutch War (1672–78) ...

mealybug

(Encyclopedia)mealybug, common name for certain unarmored scale insects that exude a granular white secretion, giving them a mealy appearance. Many are common greenhouse and crop pests. Adult females are wingless, ...

Howard Hughes Medical Institute

(Encyclopedia)Howard Hughes Medical Institute, (HHMI), nonprofit medical research organization founded in 1953 by Howard Hughes and largly funded from proceeds of the 1984–85 sale of Hughes Aircraft. Headquartere...

Antiphon, Athenian orator

(Encyclopedia)Antiphon ănˈtĭfŏn, –fən [key], c.479–411 b.c., Athenian orator. He rarely spoke in public but wrote defenses for others to speak. Of his 15 extant orations 3 were for use in court, the rest p...

alfalfa caterpillar

(Encyclopedia)alfalfa caterpillar, larva of the alfalfa butterfly, Colias eurytheme, a member of the family Pieridae. Found throughout most of Mexico, the United States, and S Canada, it is sometimes a serious pest...