simmer

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simmer

[′sim·ər]
(engineering)
The detectable leakage of fluid in a safety valve below the popping pressure.
References in periodicals archive ?
I am sure Facebook will soon return when the anger simmers down (we all saw the passive calm that followed Danish-cartoons typhoon).
However, all MEA flights to Geneva and Frankfort are still suspended until the volcanic eruptions in Iceland simmers down.
Global Care's partners have spoken to staff at the home, who say the children are all safe but everyone is staying indoors until the situation simmers down.