relaxation time: Meaning and Definition of

relaxa'tion time"

Pronunciation: [key]
— Physics. Physics.
  1. the time that it takes for an exponentially decaying quantity, as radioactive particles or transient electrical currents, to decrease to 36.8 percent of its initial value.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.