What is "daraf"

n. Non-SI unit proposed as the unit of electrical elastance. Probably not in serious use.

n. a unit of elastance equal to the reciprocal of a farad

The daraf is the unit of electrical elastance (symbol: F), the voltage across a capacitor after accepting an electric charge of 1 coulomb; it is the reciprocal of the farad. Proposed by Arthur Edwin Kennelly in 1936 as a backwards spelling ( semordnilap) of farad, the term daraf is not recognized by the SI (the preferred term being reciprocal farad).

$$1~\text{F}^{-1} = \frac{1~\text{V}}{1~\text{C}}=\frac{1~\Omega}{1~\text{s}}$$