/ Dictionary / Index T thin-layer chromatography: Meaning and Definition of Find definitions for: thin'-lay"er chromatog'raphy Pronunciation: (thin'lā"ur), [key] — Chem. Chem. chromatography in which glass plates coated with thin layers of alumina, silica gel, or cellulose are used as an adsorbent. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. think tank thinner Related Content Daily Word Quiz: soporific Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language