melting point

noun Physical Chemistry.
the temperature at which a solid substance melts or fuses.

1835–45 Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
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World English Dictionary
melting point
the temperature at which a solid turns into a liquid. It is equal to the freezing point

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American Heritage
Science Dictionary
melting point   (měl'tĭng)  Pronunciation Key 
The temperature at which a solid, given sufficient heat, becomes a liquid. For a given substance, the melting point of its solid form is the same as the freezing point of its liquid form, and depends on such factors as the purity of the substance and the surrounding pressure. The melting point of ice at a pressure of one atmosphere is 0°C (32°F); that of iron is 1,535°C (2,795°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

melting point definition

The temperature at which a given material changes from a solid to a liquid, or melts; the same temperature as freezing point. (See phases of matter.)

Note: Ice melts 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 shape gives cycloalkanes a higher melting point.
It should also have as low a melting point as possible.
Unfortunately, the top end of the temperature band is higher than the melting
  point of steel.
Each successive form is more stable and has a higher melting point.
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