Definition of isochron in English:

isochron

noun

Geology
  • A line on a diagram or map connecting points relating to the same time or equal times.

    • ‘An isochron defined by only two rutile points yields an age of 384 + / - 4 Ma.’
    • ‘Steve Austin describes the three methods of radioactive dating: 1) the model age, 2) the whole rock isochron, and 3) the mineral isochron.’
    • ‘Age of movement has been deduced from Rb-Sr mineral isochrons.’
    • ‘But now we know that meaningless isochrons can be ‘inherited’ from pre-existing rocks.’
    • ‘Although areas of slow propagation (crowding of isochrones) can be identified, no reentrant activity can be seen on the surface.’

Origin

Late 17th century (as an adjective in the sense ‘isochronous’): from Greek isokhronos, from isos ‘equal’ + khronos ‘time’.

Pronunciation

isochron

/ˈʌɪsə(ʊ)krɒn/