freezing point

noun Physical Chemistry.
the temperature at which a liquid freezes: The freezing point of water is 32°F, 0°C.

1740–50 Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
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World English Dictionary
freezing point
the temperature below which a liquid turns into a solid. It is equal to the melting point

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American Heritage
Science Dictionary
freezing point   (frē'zĭng)  Pronunciation Key 
The temperature at which a liquid, releasing sufficient heat, becomes a solid. For a given substance, the freezing point of its liquid form is the same as the melting point of its solid form, and depends on such factors as the purity of the substance and the surrounding pressure. The freezing point of water at a pressure of one atmosphere is 0°C (32°F); that of liquid nitrogen is -209.89°C (-345.8°F). See also state of matter.
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Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
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American Heritage
Cultural Dictionary

freezing point definition

The temperature at which a liquid changes into a solid; the same temperature as the melting point. (See phases of matter.)

Note: Water freezes at thirty-two degrees Fahrenheit or zero degrees Celsius.
The American Heritage® New Dictionary of Cultural Literacy, Third Edition
Copyright © 2005 by Houghton Mifflin Company.
Published by Houghton Mifflin Company. All rights reserved.
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Example sentences
The temperatures in a refrigerator and a freezer are geared to the freezing
  point of water.
With a higher freezing point, the tap water had an edge that outweighed the
  distilled water's lower temperature.
These liquid water droplets can be sustained as liquid below the freezing point.
In order for the water vapor to crystallize, the atmospheric temperature has to
  be at or below freezing point.
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