activated carbon

noun Chemistry.
  1. a form of carbon having very fine pores: used chiefly for adsorbing gases or solutes, as in various filter systems for purification, deodorization, and decolorization.

Origin of activated carbon

First recorded in 1920–25
Also called activated charcoal.
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

British Dictionary definitions for activated charcoal

activated carbon

noun
  1. a porous highly adsorptive form of carbon used to remove colour or impurities from liquids and gases, in the separation and extraction of chemical compounds, and in the recovery of solventsAlso called: activated charcoal, active carbon
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

activated charcoal in Medicine

activated charcoal

[ăktə-vā′tĭd]
n.
  1. Finely powdered charcoal treated to increase its adsorptive power; it is used in treating diarrhea, as an antidote, and in purification processes in industry.
The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.

activated charcoal in Science

activated charcoal

[ăktə-vā′tĭd]
  1. 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 © 2011. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.