Definition that contains only if
- negation (logic) a proposition that is true if and only if another proposition is false
- kerr cell optical device consisting of a transparent cell with two electrodes between two polarizing media; passes light only if the two planes of polarization are parallel; used as a high-speed shutter or to modulate a laser beam
- xor gate gate for exclusive OR; a circuit in a computer that fires only if only one of its inputs fire
- majority operation a threshold operation in which each operand is 0 or 1; output is 1 if and only if more than half the operands have the value 1
- x-or circuit gate for exclusive OR; a circuit in a computer that fires only if only one of its inputs fire
- contingency fee a fee that is payable only if the outcome is successful (as for an attorney's services)
- xor circuit gate for exclusive OR; a circuit in a computer that fires only if only one of its inputs fire