tautochrone

noun

tau·​to·​chrone

ˈtȯtəˌkrōn

plural -s

: a curve which is a cycloid under a horizontal base and down which the time of descent under gravity from every point to the lowest point is the same

Word History

Etymology

French, from taut- + Greek chronos time

First Known Use

circa 1774, in the meaning defined above

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