ˌfīkōˈbīlə̇n, -bil- noun
( -s )
Etymology: phyc- + bil- (from Latin bilis bile) + -in — more at bile
: any of a class of pigments that occur in the cells of algae, are active in photosynthesis, and are proteins combined with pyrrole derivatives related to the bile pigments — compare phycocyanin , phycoerythrin