Yotta-

//ˈjɒtə// prefix

prefix ·Rare ·Advanced level

Definitions

Prefix
  1. 1
    In the International System of Units and other metric systems of units, multiplying the unit to which it is attached by 10²⁴ (a short scale septillion or long scale quadrillion). Symbol: Y morpheme

Antonyms

All antonyms
yocto

Etymology

From Ancient Greek ὀκτώ (oktṓ, “eight”), for the eighth order of 10³. The consonants ct are reduced to tt; the final a conforms to the finals vowel of the SI series from mega- upwards; the letter y was added, as the second term in a series running through the alphabet backwards (from zetta-).

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Data sourced from Wiktionary, WordNet, CMU, and other open linguistic databases. Updated March 2026.