(nuclear physics) Of the point at which the prompt neutrons and delayed neutrons produced by a nuclear fission chain reaction, taken together, are just sufficient to sustain the chain reaction, where changes in reaction power occur slowly.

(nuclear physics) The point at which the prompt neutrons and delayed neutrons produced by a nuclear fission chain reaction, taken together, are just sufficient to sustain the chain reaction (the state of being delayed critical); in this state, changes in reaction power occur slowly, allowing the reaction to be controlled on human timescales, due to the relatively long time delay associated with the emission of the delayed neutrons necessary to maintain the chain reaction.

plural of delay tactic

Alternative form of delaying tactic (chiefly US)

plural of delay differential equation

(calculus) a type of differential equation in which the derivative of the unknown function at a certain time is given in terms of the values of the function at previous times

If a wrong is not redressed within a reasonable time, it is as though the wrong were not redressed at all.

A circadian rhythm sleep disorder in which the subject falls asleep some hours after midnight and has difficulty waking up in the morning.

(less common, telecommunications) round-trip time

plural of round-trip delay time