chromatography(A method of separating and analyzing mixtures of chemical substances by selective adsorption in a column of powder or on a strip of paper)
gas chromatography(A separation technique involving passage of a gaseous moving phase through a column containing a fixed phase; it is used principally as a quantitative analytical technique for volatile compounds)
chromium(A hard grey metallic element that takes a high polish, occurring principally in chromite: used in steel alloys and electroplating to increase hardness and corrosion-resistance)
chrysophyta(The golden-brown and orange-yellow algae; a diverse group of microscopically small algae which inhabit fresh and salt water, many being planktonic. They contain carotenoid pigments and may be unicellular, colonial, filamentous or amoeboid)