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screw

(Encyclopedia)screw, simple machine consisting essentially of a solid cylinder, usually of metal, around which an inclined plane winds spirally, either clockwise or counterclockwise. It is used to fasten one object...

Peirce, Charles Sanders

(Encyclopedia)Peirce, Charles Sanders pûrs [key], 1839–1914, American philosopher and polymath, b. Cambridge, Mass., grad. Harvard, 1859; son of Benjamin Peirce. Except for occasional lectures he renounced the r...

polytheism

(Encyclopedia)polytheism pŏlˈēthēĭzəm [key], belief in a plurality of gods in which each deity is distinguished by special functions. The gods are particularly synonymous with function in the Vedic religion (...

rue

(Encyclopedia)rue, common name for various members of the family Rutaceae, a large group of plants distributed throughout temperate and tropical regions and most abundant in S Africa and Australia. Most species are...

parochial school

(Encyclopedia)parochial school pərōˈkēəl [key], school supported by a religious body. In the United States such schools are maintained by a number of religious groups, including Lutherans, Seventh-day Adventis...

radiometer

(Encyclopedia)radiometer rāˌdēŏmˈətər [key], instrument for detection or measurement of electromagnetic radiation; the term is applied in particular to devices used to measure infrared radiation. One of the ...

vapor pressure

(Encyclopedia)vapor pressure, pressure exerted by a vapor that is in equilibrium with its liquid. A liquid standing in a sealed beaker is actually a dynamic system: some molecules of the liquid are evaporating to f...

Tantra

(Encyclopedia)Tantra tŭnˈtrə [key], in both Hinduism and Buddhism, esoteric tradition of ritual and yoga known for elaborate use of mantra, or symbolic speech, and mandala, or symbolic diagrams; the importance o...

Sung

(Encyclopedia)Sung so͝ong [key], dynasty of China that ruled 960–1279. It was divided into two periods: Northern Sung (907–1126) with its capital at Kaifeng and Southern Sung (1127–1279) with its capital at ...

Bruno, Giordano

(Encyclopedia)Bruno, Giordano jōrdäˈnō bro͞oˈnō [key], 1548–1600, Italian philosopher, b. Nola. The son of a professional soldier, he entered the Dominican order early in his youth and was ordained a pries...