tlen.
oxygen
Meaning & usage
oxygen
Where this word comes from
Etymology tree Proto-Slavic *tьlěti Polish tleć Proto-Indo-European *-nós Ancient Greek -νός (-nós) Ancient Greek -ηνός (-ēnós)der. Polish -en Polish tlen Coined by Polish physician Jan Oczapowski from tleć, tlić się (“to smoulder”); -en. Displaced kwasoród.
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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.