Definitions
1.NounThe 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.
2.NounA point at which the derivative of a function is zero or undefined, such as a minimum, a maximum, a point of inflection or, in multivariate calculus, a saddle point.
3.NounA juncture at which time a critical decision must be made.