A prefix meaning time, or as a standalone word, short for chronometer or chronograph. Used in scientific and technical contexts related to time measurement.
From Greek 'khronos' meaning time, personified as the god of time in Greek mythology. Entered scientific vocabulary through Latin in the 17th century, becoming a productive prefix in English for time-related terms.
The Greek concept of 'chronos' represented linear, measurable time, distinct from 'kairos' which meant the right or opportune moment. This distinction explains why 'chrono-' compounds focus on precise measurement rather than qualitative timing—we have chronometers, not kairometers.
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