noun Chemistry.
the separation of mixtures into their constituents by preferential adsorption by a solid, as a column of silica (column chromatography) or a strip of filter paper (paper chromatography) or by a gel.

1725–35; chromato- + -graphy

chromatographer, noun
chromatographic [kruh-mat-uh-graf-ik, kroh-muh-tuh-] , adjective
chromatographically, adverb Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
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World English Dictionary
chromatography (ˌkrəʊməˈtɒɡrəfɪ)
See also gas chromatography the technique of separating and analysing the components of a mixture of liquids or gases by selective adsorption in, for example, a column of powder (column chromatography) or on a strip of paper (paper chromatography)

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Word Origin & History

1731, from chromato-, Latinized comb. form of Gk. khroma "color" (see chromatic) + English -graphy, from -graphia "description," from graphein "to write" (about).
Online Etymology Dictionary, © 2010 Douglas Harper
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American Heritage
Medical Dictionary

chromatography chro·ma·tog·ra·phy (krō'mə-tŏg'rə-fē)
Any of various techniques for the separation of complex mixtures that rely on the differential affinities of substances for a gas or liquid mobile medium and for a stationary adsorbing medium through which they pass, such as paper, gelatin, or magnesia. Also called absorption chromatography.

chro'ma·tog'ra·pher n.
The American Heritage® Stedman's Medical Dictionary
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American Heritage
Science Dictionary
chromatography   (krō'mə-tŏg'rə-fē)  Pronunciation Key 
A technique used to separate the components of a chemical mixture by moving the mixture along a stationary material, such as gelatin. Different components of the mixture are caught by the material at different rates and form isolated bands that can then be analyzed.
The American Heritage® Science Dictionary
Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
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Example sentences
Uncover these hidden colors of fall by separating plant pigments with a process
  called paper chromatography.
He transfers the sample into a vial, which is lifted by a robotic arm into the
  gas chromatography tower.
Chromatography is used to determine the amino acids levels in the blood.
Urine chromatography is necessary to accurately measure increased levels of
  specific amino acids.
Images for Chromatography
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