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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 ...time-division
(Encyclopedia)time-division: see multiplexing. ...atomic clock
(Encyclopedia)atomic clock, electric or electronic timekeeping device that is controlled by atomic or molecular oscillations. A timekeeping device must contain or be connected to some apparatus that oscillates at a...standard of living
(Encyclopedia)standard of living, level of consumption that an individual, group, or nation has achieved. The evaluation of a standard of living is relative, depending upon the judgment of the observer as to what c...living wage
(Encyclopedia)living wage, the hourly wage that, at a minimum, supports a standard of living above the poverty level in a given locality. It differs from the minimum wage, which often provides a less than adequate ...data communications
(Encyclopedia)data communications, application of telecommunications technology to the problem of transmitting data, especially to, from, or between computers. In popular usage, it is said that data communications ...cane, walking stick
(Encyclopedia)cane, walking stick. Probably used first as a weapon, it gradually took on the symbolism of strength and power and eventually authority and social prestige. Ancient Egyptian rulers carried the symboli...Protagoras
(Encyclopedia)Protagoras prōtăgˈərəs [key], c.490–c.421 b.c., Greek philosopher of Abdera, one of the more distinguished Sophists. He taught for a time in Athens, where he was a friend of Pericles and knew S...Clavius, Cristoph
(Encyclopedia)Clavius, Cristoph krĭsˈtôf klāˈvēəs [key], 1537–1612, German astronomer and mathematician. He entered the Jesuit order in 1555 and studied at Coimbra and Rome. He taught mathematics at the Co...Galli-Curci, Amelita
(Encyclopedia)Galli-Curci, Amelita ämālēˈtä gälˈlē-ko͞orˈchē [key], 1889–1963, Italian coloratura soprano. She studied piano at the Milan Conservatory and meanwhile trained her own voice. From the time...Browse by Subject
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