## Definitions

### from The American Heritage® Dictionary of the English Language, 4th Edition

- n. Physics The temperature and pressure at which the liquid and gaseous phases of a pure stable substance become identical. Also called critical state.
- n. Mathematics A maximum, minimum, or point of inflection of a curve.
- n. Mathematics A point at which the derivative of a function is zero, infinite, or undefined.

### from Wiktionary, Creative Commons Attribution/Share-Alike License

- n. The temperature and pressure at which the vapour density of the gas and liquid phases of a fluid are equal, at which point there is no difference between gas and liquid.
- n. A maximum, minimum or point of inflection on a curve; a point at which the derivative of a function is zero or undefined.
- n. A juncture at which time a critical decision must be made.

### from the GNU version of the Collaborative International Dictionary of English

- That combination of volume and pressure, at the critical temperature of the substance, at which the liquid and gaseous phases of a given quantity of a substance have identical values for their densities and other properties.

### from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.

- n. a crisis situation or point in time when a critical decision must be made

## Etymologies

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## Examples

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## Comments

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