
1) Chemical property
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The temperature and pressure at which the solid, liquid, and gaseous forms of a substance are at equilibrium.
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http://antoine.frostburg.edu/chem/senese/101/glossary/t.shtml

In thermodynamics, the triple point of a substance is the temperature and pressure at which three phases (for example, gas, liquid, and solid) of that substance coexist in thermodynamic equilibrium.
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http://en.wikipedia.org/wiki/Glossary_of_fuel_cell_terms

In thermodynamics, the triple point of a substance is the temperature and pressure at which the three phases (gas, liquid, and solid) of that substance coexist in thermodynamic equilibrium. For example, the triple point of mercury occurs at a temperature of −38.8344 °C and a pressure of 0.2 mPa. In addition to the triple point between solid, li...
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http://en.wikipedia.org/wiki/Triple_point

The point in the PVT region at which the solid, liquid, and vapor coexist.
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http://www-bdnew.fnal.gov/operations/accgloss/gloss.html#A

The temperature and pressure at which the solid, liquid and gas phases of a substance co-exist.
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http://www.bocindustrial.co.uk/bocindustrial/technical/glossary/t.html

(from the article `liquid`) To a certain extent the behaviour of all substances is similar to that described in Figure 1. The parameters that vary from substance to substance ... ...liquid and its vapour become indistinguishable. Along the line between liquid and solid, the melting temperatures for different pressures can be ... Poin...
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http://www.britannica.com/eb/a-z/t/81

A point in a phase diagram where the three states of matter are in equilibrium.
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http://www.chemistry-dictionary.com/definition/triple+point.php

The temperature and pressure at which the vapor, liquid, and solid phases of a substance are in thermodynamic equilibrium. The triple point of water, for example, occurs at 273.16 K and 611.7 Pa. At this point, and no other, it is possible to change all of the substance to ice, water, or vapor by ma...
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http://www.daviddarling.info/encyclopedia/T/triple_point.html

The temperature at which all three phases (i.e., solid, liquid, and gas) are in equilibrium; the triple point of water (273.16 K) is a fundamental fixed point in temperature scales. ... (05 Mar 2000) ...
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http://www.encyclo.co.uk/local/20973

the temperature and pressure at which the solid, liquid, and gas phases of a substance are in equilibrium.
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http://www.encyclo.co.uk/local/21001

The intersection point between two boundaries (dry line, outflow boundary, cold front, warm front etc.), often a focus for thunderstorm development.
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http://www.encyclo.co.uk/local/22268

Type: Term Definitions: 1. the temperature at which all three phases (solid, liquid, and gas) are in equilibrium; the triple point of water (273.16 K) is a fundamental fixed point in temperature scales.
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http://www.medilexicon.com/medicaldictionary.php?t=70626

The intersection of the boundaries of three adjoining grains, as observed in a section.
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https://steelforge.com/literature/steelog-the-5000-word-metals-glossary/

The temperature at which solid, liquid and vapour can exist together in equilibrium. For water this temperature is 273.16K.Click on an item to paste into clipboard or use clipboard symbol at end to clipboard all values Benzoic Acid 395.52 KClip Hydrogen Equilibrium 13.81 Normal 13.956 KClip Neon 24.555 KClip Nitrogen 63.148 KClip Oxygen 54.361 KCli...
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https://www.encyclo.co.uk/local/20687

The temperature and pressure at which solid, liquid, and gas phases of a given substance are all present simultaneously in varying amounts.
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https://www.encyclo.co.uk/local/20850

a point in a phase diagram where the three states of matter are in equilibrium.
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https://www.encyclo.co.uk/local/22434

The intersection of the boundaries of three adjoining grains, as observed in a section.
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https://www.unifiedalloys.com/resources/glossary/
No exact match found.