One who preserves.
A person who prepares preserves of fruit or preserved meats.
A person who refinishes furniture.
A life preserver.
Something that rectifies.
The activation function f(x)= max (0,x), where x is the input to a neuron.
A device that converts alternating current into direct current; often a diode.
An instrument used for determining and rectifying the variations of the compass on board ship.