tautochrone.
A curve, such that a weighted body, descending along it by the action of gravity, will always arrive at the lowest point in the same time, wherever in the curve it begins to fall.
Meaning & usage
A curve, such that a weighted body, descending along it by the action of gravity, will always arrive at the lowest point in the same time, wherever in the curve it begins to fall.
An inverted cycloid with its base horizontal is a tautochrone.
Where this word comes from
From Ancient Greek ταὐτός (tautós, “the same”) + χρόνος (khrónos, “time”).
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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.