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polybrominated biphenyl

(Encyclopedia)polybrominated biphenyl or PBB, any of a group of organic compounds used as a fire retardant. In 1973 several thousand pounds of PBB were accidentally mixed with livestock feed that was later distribu...

Federer, Roger

(Encyclopedia)Federer, Roger, 1981–, Swiss tennis player, b. Basel. He was an outstanding junior player, ranking number one in 1998, the year he turned pro. Federer won his first Association of Tennis Professiona...

fracture

(Encyclopedia)fracture, breaking of a bone. A simple fracture is one in which there is no contact of the broken bone with the outer air, i.e., the overlying tissues are intact. In a comminuted fracture the bone is ...

Neusner, Jacob

(Encyclopedia)Neusner, Jacob, 1932–2016, American scholar and historian of Judaism, b. West Hartford, Conn, B.A. Harvard, 1953, M.A. Jewish Theological Seminary, 1960), Ph.D. Columbia, 1960. Regarded as the world...

cathode-ray tube

(Encyclopedia)CE5 Cathode-ray tube cathode-ray tube (CRT), special-purpose electron tube in which electrons are accelerated by high-voltage anodes, formed into a beam by focusing electrodes, and projected towar...

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...

identity theft

(Encyclopedia)identity theft, the use of one person's personal information by another to commit fraud or other crimes. The most common forms of identity theft occur when someone obtains another person's social secu...

Heraclitus

(Encyclopedia)Heraclitus hĕrəklīˈtəs [key], c.535–c.475 b.c., Greek philosopher of Ephesus, of noble birth. According to Heraclitus, there was no permanent reality except the reality of change; permanence wa...

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...