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blågrønalger n
environ.	blue-green alga; blue-green alga Microorganisms, formerly classified as algae but now regarded as bacteria, including nostoc, which contain a blue pigment in addition to chlorophyll
life.sc.	Cyanophyta (Cyanobacteria, Cyanophyceae, Cyanophycota, Cyanophyta); blue-green algae (Cyanobacteria, Cyanophyceae, Cyanophycota, Cyanophyta); blue-green bacteria (Cyanobacteria, Cyanophyceae, Cyanophycota, Cyanophyta); cyanobacteria (Cyanobacteria, Cyanophyceae, Cyanophycota, Cyanophyta)