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life

(Encyclopedia)life, although there is no universal agreement as to a definition of life, its biological manifestations are generally considered to be organization, metabolism, growth, irritability, adaptation, and ...

life preserver

(Encyclopedia)life preserver, a personal flotation device (PFD) intended to keep the wearer afloat, particularly in case of shipwreck. A Type I PFD will keep even unconscious people afloat in a face–up position; ...

still life

(Encyclopedia)still life, a pictorial representation of inanimate objects. The term derives from the 17th-century Dutch still-leven, meaning a motionless natural object or objects. In East Asia still-life subj...

half-life

(Encyclopedia)half-life, measure of the average lifetime of a radioactive substance (see radioactivity) or an unstable subatomic particle. One half-life is the time required for one half of any given quantity of th...

life insurance

(Encyclopedia)life insurance: see insurance.

George, Saint

(Encyclopedia)George, Saint, 4th cent.?, perhaps a soldier in the imperial army who died for the faith in Asia Minor. His life is cloaked in legends; Gibbon's identification of him with George of Cappadocia is fals...

Douglas, George

(Encyclopedia)Douglas, George, pseud. of George Douglas Brown, 1869–1902, English novelist, b. Scotland. His reputation rests on his single novel, The House with the Green Shutters (1901), a somber story of Scott...

life support system

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

Fuller, George

(Encyclopedia)Fuller, George, 1822–84, American portrait, figure, and landscape painter, b. Deerfield, Mass.; pupil of Henry K. Brown at Albany. He first practiced portraiture in Boston and later in New York City...

artificial life support

(Encyclopedia)artificial life support, systems that use medical technology to aid, support, or replace a vital function of the body that has been seriously damaged. Such techniques include artificial pacemakers, in...