Critical (Adjective)
Critical (Adjective) :
In view of the number of special meanings attached to this word, particular care should be taken when using the adjective 'critical' in its more common English senses (i.e. to mean extremely important, or as a derivative of the verb 'criticize'). (1) Having a reactivity of zero. Also used, more loosely, when the reactivity is greater than zero. See: criticality. (2) Relating to the highest doses or risks attributable to a specified source. As in, for example, critical group, critical pathway or critical radionuclide. (3) Capable of sustaining a nuclear chain reaction. As in, for example, critical mass
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