A curved line, such that a heavy 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 may begin to fall; as, an inverted cycloid with its base horizontal is a tautochrone.
Vogais: auooe
Consoantes: ttchrn
tocharian, tichorrhine, touchscreen, taxicorn, tea ceremony, touch screen, tachogram, tigrine, tsarina, tzarina.