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Traven, B.

(Encyclopedia)Traven, B., 1890–1969, German language novelist. During his life Traven refused to divulge any information concerning himself. His birth name is still uncertain, as is his birthplace. As Ret Marut h...

purification

(Encyclopedia)purification, in religion, the ceremonial removal of what the religion deems unclean. The usual agents of purification are water (as in baptism), bodily alteration (as in circumcision), and fire. The ...

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...

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 ...

vaccination

(Encyclopedia)vaccination, means of producing immunity against pathogens, such as viruses and bacteria, by the introduction of an killed or weakened microorganism, a harmless piece of a microorganism, or the like t...