Pronunciation: (dif"u-ren'shē-ā"tur), [key]
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. Elect., Electronics.a transducer or circuit (differen'tiator cir"cuit) whose output is proportional to the rate of change of the input signal.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.