[chlo.ro.phyll] n [F chlorophylle, fr. chlor- + Gk phyllon leaf--more at blade] (1819) 1: the green photosynthetic pigment found chiefly in the chloroplasts of plants and occurring esp. as a blue-black ester or a dark green ester --called also respectively chlorophyll a, chlorophyll b
2: a waxy green chlorophyll-containing substance extracted from green plants and used as a coloring agent or deodorant -- chlo.ro.phyl.lous adj