chromatography
noun /ˌkrəʊməˈtɒɡrəfi/
/ˌkrəʊməˈtɑːɡrəfi/
[uncountable] (chemistry)- the process of separating a mixture by passing it through a material through which some parts of the mixture travel further than othersWord Origin1930s: from German Chromatographie (from chromato-, from Greek khrōma, khrōmat- ‘colour’ and -graphy, from or suggested by Greek -graphia ‘writing’), early separations being displayed as a number of coloured bands or spots.