The temperature and pressure at which the solid, liquid, and vapour phases of a pure substance can coexist in equilibrium.
〔化〕（固体、液体、气体能平衡共存的）三相点，三态点
Example sentencesExamples
These two regions could be separated by a uniform liquid phase, a triple point, or an extended region in which three phases are in coexistence, one solid and two liquid.
In strict terms, this process is desiccation, not lyophilization, because water removal is done at temperatures above the triple point of water.
The kelvin is described as 1 / 273.16 of the thermodynamic temperature of the triple point of water.
The triple point of water occurs at an external pressure of .18 in and a temperature of 32.02°F.
Is there a formula to calculate the triple point of a substance?
Definition of triple point in US English:
triple point
noun
Chemistry
The temperature and pressure at which the solid, liquid, and vapor phases of a pure substance can coexist in equilibrium.
〔化〕（固体、液体、气体能平衡共存的）三相点，三态点
Example sentencesExamples
In strict terms, this process is desiccation, not lyophilization, because water removal is done at temperatures above the triple point of water.
The triple point of water occurs at an external pressure of .18 in and a temperature of 32.02°F.
The kelvin is described as 1 / 273.16 of the thermodynamic temperature of the triple point of water.
Is there a formula to calculate the triple point of a substance?
These two regions could be separated by a uniform liquid phase, a triple point, or an extended region in which three phases are in coexistence, one solid and two liquid.