- a semiconductor diode whose capacitance changes to match applied voltage, used to tune circuits by varying the reactance.
Origin of varactor
1955–60; var(iable re)actor
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018
- a semiconductor diode that acts as a voltage-dependent capacitor, being operated with a reverse biasCompare varistor
C20: probably a blend of variable reactor