Etymology

exa-

Today it means: In the International System of Units and other metric systems of units, multiplying the unit to which it is attached by 10¹⁸ (a short scale quintillion or long scale trillion); one million million million. Full definition →

Ancient Greek ἕξ
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The story

  1. Ancient Greek · derived fromἕξ“six”
  2. English todayexa-

From Ancient Greek ἕξ (héx, “six”), for the sixth order of 10³, analogous to tera-.

Words from the same roots

Ancient Greekἕξ all →

hexadecachoron

Etymology from Wiktionary, CC BY-SA 4.0.