heat' sink"

1. Thermodynam.any environment or medium that absorbs heat.
2. Also,heat'sink". Electronics.a metallic heat exchanger designed to absorb and dissipate excess heat from one of the devices, as a transistor or resistor, in a circuit.

Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.

heat shieldheatstroke
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