/dif'euh ren"shee ay'teuhr/ , n.
1. a person or thing that differentiates.
2. Computers. an electronic device whose output signal is proportional to the derivative of its input signal.
3. Electricity , Electronics. a transducer or circuit (differentiator circuit) whose output is proportional to the rate of change of the input signal.
[ 1885-90; DIFFERENTIATE + -OR 2 ]