column chromatography: chromatography that uses selective adsorption by a column of powders
chromatography: a process used for separating mixtures by virtue of differences in absorbency
hydrocephalus: an abnormal condition in which cerebrospinal fluid collects in the ventricles of the brain; in infants it can cause abnormally rapid growth of the head and bulging fontanelles and a small face; in adults the symptoms are primarily neurological