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Heron of Alexandria

(Encyclopedia)Heron of Alexandria hērˈŏn [key] or Hero, mathematician and inventor. The dates of his birth and death are unknown; conjecture places them between the 2d cent. b.c. and the 3d cent. a.d. He is beli...

hidalgo, in Spanish nobility

(Encyclopedia)hidalgo hēdälˈgō [key] [contraction of Span. hijo de algo=son of something], term designating the lowest degree of Spanish nobility, a rank above the ordinary gentry but below the great lords. The...

Du Barry, Jeanne Bécu, comtesse

(Encyclopedia)Du Barry, Jeanne Bécu, comtesse zhän bāküˈ kôNtĕsˈ dü bärēˈ, do͞obărˈē [key], 1743–93, mistress of King Louis XV of France. A courtesan of illegitimate birth, she was the mistress of...

Dubois, Guillaume

(Encyclopedia)Dubois, Guillaume gēyōmˈ dübwäˈ [key], 1656–1723, French statesman, cardinal of the Roman Catholic Church. A man of humble birth, he was tutor to Philippe II d'Orléans (see under Orléans, fa...

Altdorfer, Albrecht

(Encyclopedia)Altdorfer, Albrecht älˈbrĕkht ältdôrˈfər [key], 1480–1538, German painter and engraver. He served as city architect of Regensburg, where much of his life was spent. Although influenced by Dü...

Cardano, Girolamo

(Encyclopedia)Cardano, Girolamo or Geronimo jērôˈlämō kärdäˈnō, jārôˈnēmō [key], 1501–76, Italian physician and mathematician. His works on arithmetic and algebra established his reputation. Barred ...

network

(Encyclopedia)network, in computing, two or more computers connected for the purpose of routing, managing, and storing rapidly changing data. A local area network (LAN), which is restricted by distances of up to on...

septicemia

(Encyclopedia)septicemia sĕptĭsēˈmēə [key], invasion of the bloodstream by virulent bacteria that multiply and discharge their toxic products. The disorder, which is serious and sometimes fatal, is commonly k...

Verhaeren, Émile

(Encyclopedia)Verhaeren, Émile āmēlˈ vārärĕnˈ, vərhäˈrən [key], 1855–1916, Belgian poet and critic, a Fleming who wrote in French. His dominant passion for social reform found expression successively ...

DeBakey, Michael Ellis

(Encyclopedia)DeBakey, Michael Ellis dəbāˈkē [key], 1908–2008, American surgeon, b. Lake Charles, La. While still at Tulane medical school (M.D., 1932), DeBakey developed the roller pump, which later became a...