noun
Meaning 1
A billion years: a thousand million years, that is, a thousand thousand thousand years.
Definition source: English Wiktionary via Wiktextract
Examples
- Holonyms: exasecond < zettasecond < yottasecond < ronnasecond < quettasecond
- Meronyms: quectosecond < rontosecond < yoctosecond < zeptosecond < attosecond < femtosecond < picosecond < 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
Meaning relationships
Synonyms: giga-annum, gigaannum, Ga
Antonyms: none provided