half-adder
A digital circuit that adds two single binary digits, producing a sum and a carry output. Used as a building block in more complex adders.
A half-adder is a basic building block of a full adder.
A full adder adds three bits (including a carry-in) and is built from two half-adders and an OR gate.
Compound of 半 (half) + 加算器 (adder). A direct calque of English 'half-adder'.