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The Collaborative International Dictionary
Phyllocyanin

Phyllocyanin \Phyl`lo*cy"a*nin\, n. [Phyllo- + cyanin.] (Chem.) A blue coloring matter extracted from chlorophyll. [Written also phyllocyanine.]

Wiktionary
phyllocyanin

n. (context obsolete organic chemistry English) A blue pigment obtained by degradation of chlorophyll.