yocto-

1. a combining form used in the names of units of measure equal to one septillionth (10 -24 ) of a given base unit.

Word History and Origins

Origin of yocto-¹

First recorded in 1990–95; alteration of octo-

Example Sentences

But other than this, there has not been much need for the yocto prefix.

From Economist

Like yocto, its etymological roots lie in the Greek octa—yotta signifies one thousand raised to the 8th power, and yocto signifies one thousandth raised to the 8th power.

From Economist