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order of magnitude

or·de·rof·magnitude

fairly common

noun

1.

a degree in a continuum of size or quantity

  • “it was on the order of a mile”
  • “an explosion of a low order of magnitude”
2.

a number assigned to the ratio of two quantities; two quantities are of the same order of magnitude if one is less than 10 times as large as the other; the number of magnitudes that the quantities differ is specified to within a power of 10

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WordNet 2.1 (Princeton University). WordNet 2.1 Copyright Princeton University. All rights reserved.