| diachronic | The word diachronic is from the Greek dia-, through + chronos, time = through time. As opposed to synchronic, at one point in time. (12 Dec 1998) |
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| diachronic study | A study done over the course of time. For example, a longitudinal study of children with Down syndrome (trisomy 21) might involve the study of 100 children with this condition from birth to 10 years of age. Also called a longitudinal study. The opposite of a synchronic (cross-sectional) study. (12 Dec 1998) |
| study, diachronic | See: Study, longitudinal. (12 Dec 1998) |
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