# half-adder

## Definitions

### General Science

- noun
(written as *half adder*)

a binary adder that can produce the sum of two inputs, producing a carry output if necessary, but cannot accept a carry input

### Computing

- noun
(written as *half adder*)

a binary __addition__ circuit which can produce the sum of two inputs and a carry output if necessary, but will not accept a carry input

### Electronics

- A
__logic circuit__ which accepts two input bits, and whose output is a sum bit and a __carry bit__. Unlike a full adder, a half-adder does not accept an input carry bit. Also called two-input adder.

http://www.dictionarycentral.com/definition/half-adder.html