Pronunciation: (klôr'u-fil, klōr'-), [key]
—n. Bot., Biochem.
the green coloring matter of leaves and plants, essential to the production of carbohydrates by photosynthesis, and occurring in a bluish-black form, C55H72MgN4O5 (chlorophyll a), and a dark-green form, C55H70MgN4O6 (chlorophyll b). Also,chlo'ro•phyl.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.