Columbia Encyclopedia

Search results

277 results found

hypertension

(Encyclopedia)hypertension or high blood pressure, elevated blood pressure resulting from an increase in the amount of blood pumped by the heart or from increased resistance to the flow of blood through the small a...

Doctorow, E. L.

(Encyclopedia)Doctorow, E. L. (Edgar Lawrence Doctorow) dŏkˈtərōˌ [key], 1931–2015, American novelist, b. New York City. The author of a dozen novels, Doctorow is known for his skillful blending of fiction a...

Popper, Sir Karl Raimund

(Encyclopedia)Popper, Sir Karl Raimund, 1902–94, Anglo-Austrian philosopher, b. Vienna. He became familiar with the Vienna circle of logical positivists (see logical positivism) while a student at the Univ. of Vi...

radiation sickness

(Encyclopedia)radiation sickness, harmful effect produced on body tissues by exposure to radioactive substances. The biological action of radiation is not fully understood, but it is believed that a disturbance in ...

Swedenborg, Emanuel

(Encyclopedia)Swedenborg, Emanuel swēdˈənbôrg; āmäˈno͞oĕl svāˌdənbōrkˈ [key], 1688–1772, Swedish scientist, religious teacher, and mystic. His religious system, sometimes called Swedenborgianism, is...

heroin

(Encyclopedia)heroin hĕˈrəwən [key], opiate drug synthesized from morphine (see narcotic). Originally produced in 1874, it was thought to be not only nonaddictive but useful as a cure for respiratory illness an...

arrhythmia

(Encyclopedia)arrhythmia ārĭᵺˈmēə [key], disturbance in the rate or rhythm of the heartbeat. Various arrhythmias can be symptoms of serious heart disorders; however, they are usually of no medical significan...

growth hormone

(Encyclopedia)growth hormone or somatotropin sōmătˌətrōˈpən [key], glycoprotein hormone released by the anterior pituitary gland that is necessary for normal skeletal growth in humans (see protein). Evidence...

Schiavo case

(Encyclopedia)Schiavo case, the legal battles over the guardianship and rights of Theresa Maria Schindler Schiavo (1963–2005). Terri Schiavo was incapacitated and hospitalized in 1990, after she collapsed when he...

free will

(Encyclopedia)free will, in philosophy, the doctrine that an individual, regardless of forces external to him, can and does choose at least some of his actions. The existence of free will is challenged by determini...