capacitance unit - a measure of the capacity of a circuit component to store chargepicofarad - a unit of capacitance equal to one trillionth of a farad millifarad - a unit of capacitance equal to one thousandth of a farad farad, F - the capacitance of a capacitor that has an equal and opposite charge of 1 coulomb on each plate and a voltage difference of 1 volt between the plates abfarad - a capacitance unit equal to one billion farads |