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equilibrium

(Encyclopedia)CE5 Equilibrium equilibrium, state of balance. When a body or a system is in equilibrium, there is no net tendency to change. In mechanics, equilibrium has to do with the forces acting on a body. ...

poster

(Encyclopedia)poster, placard designed to be posted in some public place for purposes of commercial announcement or propaganda. Advertising makes wide use of posters, as do charitable and political organizations. I...

free energy

(Encyclopedia)free energy or Gibbs free energy, quantity derived from the relationships between heat and work studied in thermodynamics and used as a measure of the relative stability of a physical or chemical syst...

Pritzker Prize

(Encyclopedia)Pritzker Prize, officially The Pritzker Architecture Prize prĭtˈskər [key], award for excellence in architecture, given annually since 1979. Largely modeled on the Nobel Prize, it is the premier ar...

loran

(Encyclopedia)loran lôrˈănˌ [key], long-range, accurate radio navigational system used by a ship or aircraft to confirm or to determine its geographical position. The term loran is derived from the words long-r...

Morris, Wright

(Encyclopedia)Morris, Wright (Wright Marion Morris), 1910–98, American writer, b. Central City, Nebr. He was for many years professor of English at San Francisco State College (now San Francisco State Univ.). Fro...

Mary II, 1662–94, queen of England

(Encyclopedia)Mary II, 1662–94, queen of England, wife of William III. The daughter of James II by his first wife, Anne Hyde, she was brought up a Protestant despite her father's adoption of Roman Catholicism. In...

separation

(Encyclopedia)separation, in law, either the voluntary agreement of husband and wife to live apart or a partial dissolution of the marriage relation by court order. The marriage bond remains, and remarriage of eith...

short takeoff and landing aircraft

(Encyclopedia)short takeoff and landing aircraft (STOL), heavier-than-air craft, capable of rising from and descending to the ground with only a short length of runway, but incapable of doing so vertically. The pre...

sidereal time

(Encyclopedia)sidereal time (ST), time measured relative to the fixed stars; thus, the sidereal day is the period during which the earth completes one rotation on its axis so that some chosen star appears twice on ...