adder
/ˈædɚ/ noun C2- Someone who or something which performs arithmetic addition; a machine for adding numbers.
- An electronic device that adds voltages, currents or frequencies.
- Something which adds or increases. · They sought out cost adders with an eye toward eliminating them.
Plural adders
From the library
“It is a swamp adder!” cried Holmes; “the deadliest snake in India.
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