abfarad
n. countable C2 Proficiency ab·farad
n. a very large unit used to measure the ability of a material to store electricity. It is no longer used in modern science.
n. a unit of electrical capacitance equal to one billion farads. It is an obsolete unit that was historically used in the centimetre-gram-second system of units.
The capacitor had a capacity of one abfarad.
In older physics textbooks, you might find the abfarad listed alongside other archaic units of measurement.
While the farad is the standard unit in modern electronics, the abfarad was once used to describe the immense capacitance of certain large-scale electrical systems.