chrono-, chron-

English Events through the centuries.

Excessive and continuous gastric secretion: Pete's condition, diagnosed as gastrochronorrhea, was managed by diet, ensuring he did not eat foods that caused his stomach to overproduce certain fluids.

A reference to the chronology, or time sequences, of the Earth's history as determined by geological events: The world's geochronological past makes it possible for people to understand more clearly how the world unfolded or developed over time.

Someone who studies the chronology, or time periods, of the Earth, as based on both absolute and relative methods of age determination: Jeff's mother was a geochronologist who studied and ascertained the ages of rocks, fossils, and sediments by scrutinizing the clues that were inherent in the samples themselves.

The chronology of the Earth, or the measurement of geological time and the ordering of past geological events: Geochronology is the time sequence of the Earth’s history as governed by geological events.

Geochronology involves the research of dating and the study of time in relation to the Earth's history as revealed by geological data.

A reference to the measurement of an interval of time in relation to the history of the Earth and by using absolute or relative dating techniques: Geochronometric research involves the assessments of geologic time by scrutinizing isotopic radioactive decay.

An extension of geometry conceived as taking time into account as the fourth dimension; the geometry of space-time: Geochronometry uses faultless calculations of geologic time, as through isotopic-radioactive decay or radioactive elements or minerals.

Specifically, the dating of archaeological data in association with a geological deposit or formation: An example of geological chronology is the dating of Pleistocene human remains in the context of glacial advances and retreats.

Referring to any equatorial satellite with an orbital velocity equal to the rotational velocity of the Earth resulting in a satellite that is apparently motionless for any observer on the Earth: A geosynchronous satellite has an orbit similar to a geostationary one, except that it does not necessarily lie in the Earth's equatorial plane.

A reference to the study of the evolution of languages from a common source: In the book on glottochronological developments, Rose read about how and when languages developed into different ones from just one single language.

The determination of how long ago different languages evolved from a common source language: Glottochronology is the application of statistics to vocabulary in order to determine the degree of relationships between two or more languages and the time of their splitting off from a common ancestor.

lottochronology is the branch of lexicostatistics that studies the rate of the replacement of vocabulary and attempts to determine what percentage of basic vocabulary two presently distinct, but related languages share by using the information that is obtained to estimate how long ago they ceased being a single language.

Having varying chronaxies: A heterochron refers to differing or changing minimum times an electric current needs when applied in order to stimulate the fiber or a muscle or nerve cell.

An occurrence in evolution that involves changes in the pace and timing of development: Heterochrony can produce changes in size and shape of an organism and might be the connection between genetics at one furthermost point and a natural selection at the other furthermost point of time.

Heterochronism refers to the departure from the usual sequence in the development of organs or parts in an organism.

In palaeontology, relating to an occurrence that happens at different times and not in a genetic order: A heterochronous process or development can take place in an organic form at an abnormal time or out of a regular sequence.

Regarding something occurring at the same time, age in successive generations, or at corresponding times; simultaneous: There were a few homochronous characteristics in Jim's children that were the same as when he was their age.