Janus.
The god of doorways, gates and transitions, and of beginnings and endings, having two faces looking in opposite directions.
Meaning & usage
The god of doorways, gates and transitions, and of beginnings and endings, having two faces looking in opposite directions.
Used to indicate things with two faces (such as animals with diprosopus) or aspects; or made of two different materials; or having a two-way action.
Janus cat, Janus particle
Used to indicate things with two faces (such as animals with diprosopus) or aspects; or made of two different materials; or having a two-way action. Used to indicate an azo dye with a quaternary ammonium group, frequently with the diazo component being safranine.
Janus green B is a dye used widely in histology to stain cells for microscopic examination.
A two-faced person, a hypocrite.
A moon of Saturn.
A male given name from Latin.
Where this word comes from
From Latin Iānus (“the Roman god Janus”).
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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.