Source : Webster's Revised Unabridged Dictionary (1913)

Chlorophyll \Chlo"ro*phyll\, n. [Gr. ? light green + ? leaf: cf.
   F. chlorophylle.] (Bot.)
   Literally, leaf green; a green granular matter formed in the
   cells of the leaves (and other parts exposed to light) of
   plants, to which they owe their green color, and through
   which all ordinary assimilation of plant food takes place.
   Similar chlorophyll granules have been found in the tissues
   of the lower animals. [Written also {chlorophyl}.]

Source : WordNet®

chlorophyl
     n : any of a group of green pigments found in photosynthetic
         organisms [syn: {chlorophyll}]