yocto-

Ancient Greek ὀκτώ (oktṓ, “eight”), for the eighth order of 10⁻³. The letter y was added, as the second term in a series running backwards through the alphabet.

yocto-

1. In the International System of Units and other metric systems of units, multiplying the unit to which it is attached by 10⁻²⁴. Symbol: y

• yotta-

• cooty

Ancient Greek ὀκτώ (oktṓ, “eight”), for the eighth order of 10⁻³. The letter y was added, as the second term in a series running backwards through the alphabet.

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yocto-

1. yocto-