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multiple personality

(Encyclopedia)multiple personality, a very rare psychological disorder in which a person has two or more distinct personalities, each with its own thoughts, feelings, and patterns of behavior. The personalities oft...

meteor shower

(Encyclopedia)meteor shower, increase in the number of meteors observed in a particular part of the sky. The trails of the meteors of a meteor shower all appear to be traceable back to a single point in the sky, kn...

Navalny, Alexei Anatolyevich

(Encyclopedia)Navalny, Alexei Anatolyevich, 1976–, Russian lawyer and political activist. Navalny joined the Russian United Democratic party...

papal election

(Encyclopedia)papal election, election of the pope by the college of cardinals meeting in secret conclave in the Sistine Chapel not less than 15 nor more than 18 days after the death of the previous pontiff. In the...

parent and child

(Encyclopedia)parent and child, legal relationship, created by biological (birth) relationship or by adoption, that confers certain rights and duties on parent and child; in some states the courts have given the no...

Macapagal-Arroyo, Gloria

(Encyclopedia)Macapagal-Arroyo, Gloria ärōˈyō [key], 1947–, Philippine political leader, president of the Philippines (2001–10), daughter of Diosdado Macapagal. A professor of economics, she entered governm...

uracil

(Encyclopedia)uracil yo͝orˈəsĭl [key], organic base of the pyrimidine family. It was isolated from herring sperm and also produced in a laboratory in 1900–1901. When combined with the sugar ribose in a glycos...

Sacks, Oliver Wolf

(Encyclopedia)Sacks, Oliver Wolf, 1933–2015, British neurologist and author, b. London, educated at Queen's College, Oxford. In 1960 he moved to the United States, where he continued his medical training. He bega...

thymine

(Encyclopedia)thymine thīˈmēn [key], organic base of the pyrimidine family. Thymine was the first pyrimidine to be purified from a natural source, having been isolated from calf thymus and beef spleen in 1893–...

Pynchon, Thomas

(Encyclopedia)Pynchon, Thomas pĭnˈchən [key], 1937–, American novelist, b. Glen Cove, N.Y., grad. Cornell, 1958. Pynchon is noted for his amazingly fertile imagination, his wild sense of humor, and the teeming...