obversion

[ ob-vur-zhuh n, -shuh n ]
/ ɒbˈvɜr ʒən, -ʃən /
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noun

an act or instance of obverting.
something that is obverted.
Logic. a form of inference in which a negative proposition is obtained from an affirmative, or vice versa, as “None of us is immortal” is obtained by obversion from “All of us are mortal.”

Nearby words

  1. obulg.,
  2. obumbrant,
  3. obumbrate,
  4. obv,
  5. obverse,
  6. obvert,
  7. obviable,
  8. obviate,
  9. obviation,
  10. obvious

Origin of obversion

1840–50; < Late Latin obversiōn- (stem of obversiō) a turning toward, equivalent to obvers(us) (see obverse) + -iōn- -ion

Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

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