order of magnitude

Noun
  1. A degree in a continuum of size or quantity (synset 105098520)
    "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 (synset 113845863)

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