subtracter

Noun
  1. A person who subtracts numbers (synset 110690739)
    is a type of: calculator, computer, estimator, figurer, reckoner - an expert at calculation (or at operating calculating machines)
  2. A machine that subtracts numbers (synset 104356066)
    is a type of: calculating machine, calculator - a small machine that is used for mathematical calculations; can be mechanical or electronic

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