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Rankine temperature scale

(Encyclopedia)Rankine temperature scale, temperature scale having an absolute zero, below which temperatures do not exist, and using a degree of the same size as that used by the Fahrenheit temperature scale. Absol...

Australopithecus

(Encyclopedia)Australopithecus ôstrāˌlōpĭthˈəkəs, –pəthēˈkəs [key], an extinct hominin genus found in Africa between about 4 and 1 million years ago. At least seven species of australopithecines are n...

Cepheid variables

(Encyclopedia)Cepheid variables sēˈfēĭd [key], class of variable stars that brighten and dim in an extremely regular fashion. The periods of the fluctuations (the time to complete one cycle from bright to dim a...

Kelvin temperature scale

(Encyclopedia)Kelvin temperature scale, a temperature scale having an absolute zero below which temperatures do not exist. Absolute zero, or 0K, is the temperature at which molecular energy is a minimum, and it c...

space-time

(Encyclopedia)space-time, central concept in the theory of relativity that replaces the earlier concepts of space and time as separate absolute entities. In relativity one cannot uniquely distinguish space and time...

Corinth, city, Greece

(Encyclopedia)Corinth kôˈrĭnthôs [key], city, capital of Corinth prefecture, S Greece, in the NE Pelopo...

amber

(Encyclopedia)amber, fossilized tree resin. Amber can vary in color from yellow to red to green and blue. The best commercial amber is transparent, but some varieties are cloudy. To be called amber, the resin must ...

screen

(Encyclopedia)screen, in architecture, partition or enclosure not extending to the ceiling; usually a structure in stone, wood, or metal. It frequently serves to mark the boundaries of portions of churches and cath...

Vinland

(Encyclopedia)Vinland or Wineland, section of North America discovered by Leif Ericsson in the 11th cent. The sources for the knowledge of Leif Ericsson's exploration differ as to whether it was planned or accident...

Celtic Church

(Encyclopedia)Celtic Church, name given to the Christian Church of the British Isles before the mission (597) of St. Augustine of Canterbury from Rome. Founded in the 2d or 3d cent. by missionaries from Rome or Gau...