nonillion

As we have seen that one nought goes to each potency, for the thirtieth potency we will have for the denominator one followed by thirty noughts; or the original drop of drug in one nonillion drops of alcohol!

The first six figures from the right hand are called the unit period, the next six the million period, after which the trillion, quadrillion, quintillion, sextillion, septillion, octillion, and nonillion periods, follow in their order.