[iso.chron] or iso.chrone n [ISV is- + -chron (fr. Gk chronos time)] (1881): an imaginary line or a line on a chart connecting points at which an event occurs simultaneously or which represents the same time or time difference
ISOCHRON
Meaning of ISOCHRON in English
Merriam-Webster English vocab. Английский словарь Merriam Webster. 2012