Noun
phycobiliprotein (countable and uncountable, plural phycobiliproteins)
English Wikipedia has an article on:phycobiliproteinWikipedia
Any of a class of water-soluble proteins, present in cyanobacteria and certain algae, that capture light energy which is then passed on to chlorophylls during photosynthesis; the most important constituents of the phycobilisomes.