S: (n) relaxation, relaxation behavior ((physics) the exponential return of a system to equilibrium after a disturbance)
S: (n) easiness, relaxation (a feeling of refreshing tranquility and an absence of tension or worry) "the easiness we feel when sleeping"
S: (n) relaxation, loosening, slackening (an occurrence of control or strength weakening) "the relaxation of requirements"; "the loosening of his grip"; "the slackening of the wind"
S: (n) rest, ease, repose, relaxation (freedom from activity (work or strain or responsibility)) "took his repose by the swimming pool"
S: (n) relaxation, relaxation method (a method of solving simultaneous equations by guessing a solution and then reducing the errors that result by successive approximations until all the errors are less than some specified amount)