Picosecond
noun ·Rare ·Advanced level
Definitions
- 1 An SI unit of time equal to 10⁻¹² seconds. Symbol: ps
"Holonyms: nanosecond < microsecond < millisecond < centisecond < decisecond < second < decasecond < minute < hectosecond < kilosecond < hour < day < week < megasecond < fortnight < month < year < gigasecond < century < kiloannum, kiloyear, millennium < terasecond < mega-annum, megayear < petasecond < giga-annum, gigayear < exasecond < zettasecond < yottasecond < ronnasecond < quettasecond"
- 2 one trillionth (10^-12) of a second; one thousandth of a nanosecond wordnet
Example
More examples"Holonyms: nanosecond < microsecond < millisecond < centisecond < decisecond < second < decasecond < minute < hectosecond < kilosecond < hour < day < week < megasecond < fortnight < month < year < gigasecond < century < kiloannum, kiloyear, millennium < terasecond < mega-annum, megayear < petasecond < giga-annum, gigayear < exasecond < zettasecond < yottasecond < ronnasecond < quettasecond"
Etymology
From pico- (“metric prefix”) + second.
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Data sourced from Wiktionary, WordNet, CMU, and other open linguistic databases. Updated March 2026.