Definition of isochron in English:

Share this entry


Pronunciation: /ˈīsəˌkrän/


chiefly Geology
A line on a diagram or map connecting points relating to the same time or equal times.
Example sentences
  • Age of movement has been deduced from Rb-Sr mineral isochrons.
  • 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.


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

For editors and proofreaders

Syllabification: i·so·chron

Share this entry

What do you find interesting about this word or phrase?

Comments that don't adhere to our Community Guidelines may be moderated or removed.