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interference
interference in physics, the effect produced by the combination or superposition of two systems of Waves , in which these waves reinforce, neutralize, or in other ways interfere with each other. Interference is observed in both sound waves and electromagnetic waves, especially those of visible lig...
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chiropractic
chiropractic [Gr.,=doing by hand], medical practice based on the theory that all disease results from a disruption of the functions of the nerves. The principal source of interference is thought to be displacement (or subluxation) of vertebrae of the spine, although other areas such as joints and m...
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iridescence
iridescence , exhibition of rainbowlike colors on a surface. It usually results from interference when light composed of different wavelengths is reflected from the superficial layers of organic or inorganic substances, e.g., minerals, mother-of-pearl, and the feathers of birds. Iridescence greatl...
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adenoids
adenoids , common name for the pharyngeal tonsils, spongy masses of lymphoid tissue that occupy the nasopharynx, the space between the back of the nose and the throat. Normally the adenoids, like the palatine tonsils located on either side of the throat, help prevent infection in the surrounding tis...
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Andrew Zachary Fire
Andrew Zachary Fire 1959-, American geneticist, b. Palo Alto, Calif., Ph.D. Massachusetts Institute of Technology, 1983. After a long association with the Carnegie Institution of Washington (1986-2003), Fire became a professor at Stanford Univ. in 2003. Fire and Craig Mello received the 2006 Nobe...
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atrophy
atrophy , diminution in the size of a cell, tissue, or organ from its fully developed normal size. Temporary atrophy may occur in muscles that are not used, as when a limb is encased in a plaster cast. Interference with cellular nutrition, as through starvation; diseases affecting the nerve supply o...
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coherence
coherence constant phase difference in two or more Waves over time. Two waves are said to be in phase if their crests and troughs meet at the same place at the same time, and the waves are out of phase if the crests of one meet the troughs of another. The waves are incoherent if the crests and tr...
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cytology
cytology , in biology, the study of the structure of all normal and abnormal components of cells and the changes, movements, and transformations of such components. The discipline includes cytogenics, cytochemistry, and microscopic anatomy, which involve investigations employing various microscopes,...
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Danbury Hatters' Case
Danbury Hatters' Case decided in 1908 by the U.S. Supreme Court. In 1902 the hatters' union instituted a nationwide boycott of the products of a nonunion hat manufacturer in Danbury, Conn., and the manufacturer brought suit against the union for unlawfully combining to restrain trade in violation o...
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Augustin Jean Fresnel
Augustin Jean Fresnel 1788-1827, French physicist and engineer. He is known for his research on light, especially on conditions governing interference phenomena in polarized light and on double refraction. His work supported the wave theory of light and the concept of transverse vibrations in light...
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