Webster's English Dictionary

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chlorophyll

chlo.ro.phyll also chlo.ro.phyl \'klo-r-*-.fil, 'klo.r-, -f*l\ 
   \.klo-r-*-'fil-.o-s, .klo.r-\ \-*s\ n [F chlorophylle, fr. chlor- + Gk 
   phyllon leaf - more at ]BLADE 1: the green photosynthetic coloring matter 
   of plants found in chloroplasts  and made up chiefly of a blue-black ester 
   C55H72MgN4O5 and a dark green ester C55H70MgN4O6 - called also respectively 
   chlorophyll a, chlorophyll b  2: a waxy green chlorophyll-containing 
   substance extracted from green plant s and used as a coloring agent or for 
   its claimed deodorant properties - chlo.ro.phyl.lose aj