precipice
The Concise Oxford Dictionary of English Etymology
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1996
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© The Concise Oxford Dictionary of English Etymology 1996, originally published by Oxford University Press 1996. (Hide copyright information)
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precipice † headlong fall XVI; vertical steep face of rock, etc. XVII. — F.
précipice or L.
præcipitium, f.
præceps,
præcip- headlong, steep, or
præcipitāre, f.
præ- PRE- +
caput,
capit- head.
Hence
precipitate sb. (chem.) XVI; adj. headlong, headforemost XVII; vb. throw headlong XVI; deposit in solid form from a solution XVII;
precipitation XVII (— F. or L.). So
precipitous precipitate XVII; of the nature of a precipice. — F. †
précipiteux.
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perturbation
Book article from: The Columbia Encyclopedia, Sixth Edition
perturbation , in astronomy and physics...effect produced by the perturbation, e.g., a change...important effect of perturbations is the advance, or...derived. However, the perturbations caused by the gravitational...
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secular perturbation
Book article from: A Dictionary of Astronomy
secular perturbation A perturbation in a body's orbit that is cumulative, causing an orbital element to grow or decrease...longitude of perihelion, and times of perihelion passage, as well as causing periodic perturbations.
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periodic perturbation
Book article from: A Dictionary of Astronomy
periodic perturbation A disturbance in a body's orbit that is oscillatory in nature, having a certain period and amplitude. Such perturbations can occur in all six elements of the orbit (see elements, orbital ) and are usually termed long...
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balance
Book article from: The Oxford Companion to the Body
...equilibrium’ if any small perturbation generates a force to oppose the...about in such a way as to resist perturbations. A piece of furniture, such...itself appropriately moved by the perturbation. When an egg is placed on a...
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Encke, Johann Franz
Dictionary entry from: Complete Dictionary of Scientific Biography
...investigations into special perturbations are worth attention even...had already computed the perturbations of the four oldest planetoids...orbits, and in computing perturbations, as well as in fields now...orbit determinations and perturbation computations. Encke published...
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