phase shift

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phase shift

in nuclear magnetic resonance, the change in phase caused by movement of the spins, which can be used to show fluid flow.
Farlex Partner Medical Dictionary © Farlex 2012

phase shift

An alteration in the time relationship between the peaks (or troughs) of two different periodic functions. Thus, two circadian rhythms may suffer a phase shift as in jet lag.
Collins Dictionary of Medicine © Robert M. Youngson 2004, 2005