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heartwood
heartworm
hearty
heat
heat balance
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heat capacity
heat death
heat engine
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heat sink
heat sink (plural heat sinks)


noun 
Definition:
 
heat-regulating device: a device, often a metal plate, that conducts and dissipates unwanted heat generated by an electronic component or power supply
Encarta® World English Dictionary [North American Edition] © & (P)2009 Microsoft Corporation. All rights reserved. Developed for Microsoft by Bloomsbury Publishing Plc.
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