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ultrasonics

(Encyclopedia)ultrasonics, study and application of the energy of sound waves vibrating at frequencies greater than 20,000 cycles per second, i.e., beyond the range of human hearing. The application of sound energy...

dolphin, aquatic mammal

(Encyclopedia)dolphin, aquatic mammal, any of the small toothed whales of the family Delphinidae, numbering more than 50 species. These include the true, or beaked, dolphins, the killer whale, the pilot whale, and ...

race

(Encyclopedia)race, one of the group of populations regarded as constituting humanity. The differences that have historically determined the classification into races are predominantly physical aspects of appearanc...

life support system

(Encyclopedia)life support system: see artificial life support; Life Support for Human Spaceflight under space science. ...

genetic engineering

(Encyclopedia)CE5 Genetic engineering: Gene-splicing techniques genetic engineering, the use of various methods to manipulate the DNA (genetic material) of cells to change hereditary traits or produce biologica...

Morpheus

(Encyclopedia)Morpheus môrˈfēəs [key], in Greek and Roman mythology, god of dreams. The son of Hypnos (or Somnus), the god of sleep, he brought dreams of human forms. His brothers Phobetor and Phantasos induced...

Health, Education, and Welfare, United States Department of

(Encyclopedia)Health, Education, and Welfare, United States Department of: see Education, United States Department of; Health and Human Services, United States Department of. ...

Cecrops

(Encyclopedia)Cecrops sēˈkrŏps [key], in Greek mythology, founder and first king of Athens. A primeval being, he was half man and half serpent. As a maker of laws, he abolished human sacrifice, established monog...

Montagnier, Luc Antoine

(Encyclopedia)Montagnier, Luc Antoine, 1932–, French virologist, M.D. Sorbonne, 1960. Montagnier was a researcher at the Medical Research Council at Carshalton, London (1960–63), the Institute of Virology in Gl...

Condorcet, Marie Jean Antoine Nicolas Caritat, marquis de

(Encyclopedia)Condorcet, Marie Jean Antoine Nicolas Caritat, marquis de märēˈ zhäN äNtwänˈ nēkôläˈ kärētäˈ märkēˈ də kôNdôrsāˈ [key], 1743–94, French mathematician, philosopher, and politic...