The inverse of impedance. Usually denoted as "Y" in electrical equations, or 1/Z, Z being impedance. The
unit value of admittance is commonly dubbed "mhos" (backwards spelling of ohms.) It is a measure of the lack of impedance in a circuit,
system of circuits or a specific conductor. A short circuit should, ideally, have an admittance of infinity. An open circuit
will have an ideal admittance of 0 mhos.