noun ·Rare ·Advanced level

Definitions

Noun

1. 1
   An SI unit of time equal to 10¹⁵ seconds. Symbol: Ps. (= 31 709 800 years)

   "Holonyms: giga-annum, gigayear < exasecond < zettasecond < yottasecond < ronnasecond < quettasecond"

Example

More examples

"Holonyms: giga-annum, gigayear < exasecond < zettasecond < yottasecond < ronnasecond < quettasecond"

Etymology

From peta- + second.

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