billion.
trillion (10¹²)
Meaning & usage
trillion (10¹²)
billion (10⁹)
Where this word comes from
From bi- (“two”) + -illion; i.e., a million million. Coined by Jehan Adam in 1475 as by-million. Rendered as byllion by Nicolas Chuquet in 1484, in his article “Triparty en la science des nombres”.
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Definitions, grammatical labels, IPA, etymology and examples: Wiktionary contributors, extracted by Kaikki / Wiktextract. Adapted under CC BY-SA 4.0. Selected fields and authored examples are shown; third-party quotations and audio are omitted. See contributor history.
Last enriched 2026-09-10. Definitions are in English. Romanizations are shown when supplied by the source; syllable estimates are omitted for unsupported scripts.