exa-

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

exa-

2. 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).

   Alternative form: E- (symbol)

• atto-

• exbi-

• Axe, axe

• IPA^(key): [ɛɡza ]

exa-

1. exa- (10¹⁸)

   ‎exa- + ‎joule → ‎exajoule

• Audio:

  (file)

exa-

1. exa-

• IPA^(key): /ɛɡ.za/

• Audio (France (Vosges)):

  (file)

exa-

1. exa-

exa-

1. exa- (SI prefix multiplying the unit by 10¹⁸)

• “exa-”, in Dicionário Priberam da Língua Portuguesa (in Portuguese), Lisbon: Priberam, 2008–2026

Borrowed from English exa-, from Ancient Greek ἕξ (héx, “six”), for the sixth order of 10³, analogous to peta- and tera-.

exa-

1. exa- (SI prefix multiplying the unit by 10¹⁸)

• “exa-”, in Diccionario de la lengua española [Dictionary of the Spanish Language] (in Spanish), online version 23.8.1, Royal Spanish Academy [Spanish: Real Academia Española], 15 December 2025