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heat of fusion

noun, Physics.
the heat absorbed by a unit mass of a given solid at its melting point that completely converts the solid to a liquid at the same temperature: equal to the heat of solidification.
Compare latent heat. Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2015.
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heat-of-fusion in Science
heat of fusion  
The amount of heat required to convert a solid at its melting point into a liquid without an increase in temperature. Liquids release the same amount of heat when they solidify. See also heat of vaporization.
The American Heritage® Science Dictionary
Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
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