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supercritical

su·per·crit·i·cal [ spər kríttik'l ]


adjective 
Definition:
 
1. highly critical: highly critical of something, e.g. a person's work

2. nuclear physics self-sustaining as nuclear reaction: describes a nuclear chain reaction that sustains itself explosively because a single transformation produces more than one other transformation

3. physics above critical temperature and pressure: describes a fluid at temperatures and pressures higher than those at which the liquid and gaseous states of the given substance would have the same density

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