a unit of capacitance equal to one millionth of a farad
- The millionth section of a farad
- The millionth section of a farad.
(n.) The millionth part of a farad.
The reason for this is that the capacity of a simple antenna is very small - it may be something of the order of 0.0002 of a microfarad - and hence the energy stored up in it even under a high voltage is also small.