Definition of adder

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  • adder is a valid Scrabble US word with a point value of 7
  • adder is a valid Scrabble UK word with a point value of 7
  • adder is a valid Words with friends word with a point value of 7

Definition of adder

  • small terrestrial viper common in northern Eurasia (noun)

    Synonyms

    1. common viper
    2. vipera berus
  • a machine that adds numbers (noun)
  • a person who adds numbers (noun)

See definition of adder in Merriam Webster