jetlag

n. feeling of physical exhaustion and disorientation caused by travelling between time zones

Jet lag, also jetlag or jet-lag, is a physiological condition which is a consequence of alterations to the circadian rhythm. Such alterations result from shift work, daylight saving time, altered day length, or as the name implies, transmeridian travel as on a jet plane. They are known as desynchronosis, dysrhythmia, dyschrony, jet lag, or jet syndrome. The condition is generally believed to be the result of disruption of the "light/dark" cycle that entrains the body's circadian rhythm. It can be exacerbated by environmental factors.
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Jet lag is a condition marked by fatigue, insomnia, and irritability that is caused by air travel through changing time zones. [more]Jetlag - Community and Resources

n. jet lag, time difference between countries located in different time zones

n. jetlag (Aeronautics)