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Definitions

from The American Heritage® Dictionary of the English Language, 4th Edition

  • n. Decomposition or transformation of a compound caused by heat.

from Wiktionary, Creative Commons Attribution/Share-Alike License

  • n. The decomposition of a material or compound due to heat in the absence of oxygen or any other reagents

from The Century Dictionary and Cyclopedia

  • n. Chemical decomposition produced by exposure to a high temperature.

from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.

  • n. transformation of a substance produced by the action of heat

Etymologies

From the Ancient Greek terms πῦρ (pyr, "fire") and λύσις (lysis, "loosing"). (Wiktionary)

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