What does "yottasecond" mean?

An SI unit of time equal to 10²⁴ seconds. Symbol: Ys. (= quadrillions of years, a hypothetical time span that is meaningless except in speculative contexts such as theoretical physics, philosophy, religion, and humorous hyperbole)

Yottasecond

noun

noun ·Rare ·Advanced level

Definitions

Noun

1
An SI unit of time equal to 10²⁴ seconds. Symbol: Ys. (= quadrillions of years, a hypothetical time span that is meaningless except in speculative contexts such as theoretical physics, philosophy, religion, and humorous hyperbole)
"Holonyms: ronnasecond < quettasecond"

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"Holonyms: ronnasecond < quettasecond"

Etymology

From yotta- + second.

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