The Collaborative International Dictionary
Isochronism
Isochronism \I*soch"ro*nism\, n. The state or quality of being isochronous.
Wiktionary
isochronism
n. The state or quality of being isochronous.
Usage examples of "isochronism".
Both theory and experience prove that, to preserve its isochronism, it must be shorter towards the equator, and longer towards the poles.