activated charcoal

Science Dictionary
activated charcoal   (āk'tə-vā'tĭd)  Pronunciation Key 
Highly absorbent carbon obtained by heating granulated charcoal to expel any gases it contains, resulting in a highly porous form with a very large surface area. It is used primarily for purifying gases by adsorption, solvent recovery, or deodorization and as an antidote to certain poisons.
The American Heritage® Science Dictionary
Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
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