| | - Reformed Church of Hungary
- Reformed church that developed in Hungary during and after the 16th-century Protestant Reformation. The influence of the Reformation was felt early in Hungary. A synod at Erdod adopted the Lutheran ...
- Reformed Churches in The Netherlands
- second largest Protestant church in The Netherlands, organized in 1892 by a merger of the Christian Reformed Church and a group of Reformed churches that were followers of Abraham Kuyper, ...
- Reformed League
- voluntary association of German Reformed churches founded at Marburg in 1884 to aid Reformed churches and to conserve the Reformed heritage in Germany. It was organized by Reformed pastors and ...
- reforming
- in chemistry, processing technique by which the molecular structure of a hydrocarbon is rearranged to alter its properties. The process is frequently applied to low-quality gasoline stocks to improve their ...
- refraction
- in physics, the change in direction of a wave passing from one medium to another caused by its change in speed. For example, waves in deep water travel faster than ...
- refractive index
- measure of the bending of a ray of light when passing from one medium into another. If i is the angle of incidence of a ray in vacuum (angle between ...
- refractory
- any material that has an unusually high melting point and that maintains its structural properties at very high temperatures. Composed principally of ceramics, refractories are employed in great quantities in ...
- refractory
- material not deformed or damaged by high temperatures, used to make crucibles, incinerators, insulation, and furnaces, particularly metallurgical furnaces. Refractories are produced in several forms: molded bricks of various shapes ...
- refrain
- a phrase, line, or group of lines repeated at intervals throughout a poem, generally at the end of the stanza. Refrains are found in the ancient Egyptian Book of the ...
- refrigeration
- the process of removing heat from an enclosed space or from a substance for the purpose of lowering the temperature.
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