adder

/ˈædər/

/ˈædə/

Other forms: adders

Definitions of adder

1. noun

   a person who adds numbers
   type of:

   calculator, computer, estimator, figurer, reckoner

   an expert at calculation (or at operating calculating machines)
2. noun

   a machine that adds numbers
   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

   type of:

   viper

   venomous Old World snakes characterized by hollow venom-conducting fangs in the upper jaw