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superposition

[soo-per-puh-zish-uh n] /ˌsu pər pəˈzɪʃ ən/
noun, Geology
1.
the order in which sedimentary strata are superposed one above another.
Origin of superposition
1790-1800
1790-1800; < French superposition; see super-, position
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Based on the Random House Dictionary, © Random House, Inc. 2015.
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British Dictionary definitions for superposition

superposition

/ˌsuːpəpəˈzɪʃən/
noun
1.
the act of superposing or state of being superposed
2.
(geology) the principle that in any sequence of sedimentary rocks which has not been disturbed, the oldest strata lie at the bottom and the youngest at the top
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition
© William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
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Word Origin and History for superposition
n.

1650s, from French superposition, from Late Latin superpositionem (nominative superpositio), noun of action from past participle stem of superponere, from super (see super-) + ponere "to put, place" (see position).

Online Etymology Dictionary, © 2010 Douglas Harper
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superposition in Science
superposition
  (s'pər-pə-zĭsh'ən)   
  1. The principle that in a group of stratified sedimentary rocks the lowest were the earliest to be deposited.

  2. The principle by which the description of the state of a physical system can be broken down into descriptions that are themselves possible states of the system. For example, harmonic motion, as of a violin string, can be analyzed as the sum of harmonic frequencies or harmonics, each of which is itself a kind of harmonic motion; harmonic motion is therefore a superposition of individual harmonics.

  3. The combination of two or more physical states, such as waves, to form a new physical state in accordance with this principle. See also wave, See Note at Schrödinger.


The American Heritage® Science Dictionary
Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
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