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Any of several bluish phycobiliproteins that are found especially in cyanobacteria.
American Heritage® Dictionary of the English Language, Fifth Edition. Copyright © 2016 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
phy•co•cy•an•in(ˌfaɪ koʊˈsaɪ ə nɪn)
a blue protein pigment, present in algae, that is involved in photosynthesis.
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