duocentillion.
10³⁰⁹.
Meaning & usage
10³⁰⁹.
Where this word comes from
From duo- (“two”) + centillion. Compare Latin ducentī (“two hundred”). Coined by Alfred Holbrook Alfred Holbrook, a principal of South-Western Normal School in Lebanon, Ohio, in 1859 (see the quotation).
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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.