Etymology

yocto-

yoc·to-

Today it means: In the International System of Units and other metric systems of units, multiplying the unit to which it is attached by 10⁻²⁴ short scale septillionth or long scale quadrillionth). Full definition →

Ancient Greek ὀκτώ
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The story

  1. Ancient Greek · derived fromὀκτώ“eight”
  2. English todayyocto-

From 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.

Words from the same roots

Ancient Greekὀκτώ all →

octapodyocto-octodontidyotta-

Etymology from Wiktionary, CC BY-SA 4.0.