adder

Definitions of adder
  1. noun
    a person who adds numbers
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    type of:
    calculator, computer, estimator, figurer, reckoner
    an expert at calculation (or at operating calculating machines)
  2. noun
    a machine that adds numbers
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    type of:
    calculating machine, calculator
    a small machine that is used for mathematical calculations
  3. noun
    small terrestrial viper common in northern Eurasia
    synonyms: Vipera berus, common viper
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    type of:
    viper
    venomous Old World snakes characterized by hollow venom-conducting fangs in the upper jaw
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