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 (sī′ə-nō-băk-tîr′ē-əm, sī-ăn′ō-)
n. pl. cy·a·no·bac·te·ri·a (-tîr′ē-ə)
Any of various photosynthetic bacteria of the phylum Cyanobacteria that are generally blue-green in color and are widespread in marine and freshwater environments, with some species capable of nitrogen fixation. Also called blue-green alga, blue-green bacterium.


pl n, sing -rium (-rɪəm)
(Microbiology) a group of photosynthetic bacteria (phylum Cyanobacteria) containing a blue photosynthetic pigment. Former name: blue-green algae

blue′-green` al′gae
any of various groups of prokaryotic microorganisms of the phylum Cyanophyta, containing chlorophyll and a blue pigment. Also called cyanobacteria.
ThesaurusAntonymsRelated WordsSynonymsLegend:
Noun1.cyanobacteria - predominantly photosynthetic prokaryotic organisms containing a blue pigment in addition to chlorophyllcyanobacteria - predominantly photosynthetic prokaryotic organisms containing a blue pigment in addition to chlorophyll; occur singly or in colonies in diverse habitats; important as phytoplankton
eubacteria, eubacterium, true bacteria - a large group of bacteria having rigid cell walls; motile types have flagella
class Cyanobacteria, class Cyanophyceae, Cyanophyceae - photosynthetic bacteria found in fresh and salt water, having chlorophyll a and phycobilins; once thought to be algae: blue-green algae
nostoc - found in moist places as rounded jellylike colonies
trichodesmium - large colonial bacterium common in tropical open-ocean waters; important in carbon and nitrogen fixation
References in periodicals archive ?
One has to recognise which species of green and blue algae one can use for the purpose," he remarked.
Award procedure: : public invitation to tender designation / procedure number : a 67_2017 mo4b1 procurement subject retrofitting of an existing measuring buoy with a multi-channel fluorescence probe short description: procurement and integration of a multichannel fluorescence probe for the detection of various algae groups (total chlorophyll, green algae, blue algae, diatoms, cryptophyceae, yellow matter correction, unbound phycocyanin) in an existing awatos measuring buoy (based on weiseler measuring buoy).
China saw its first river chief in 2007 when the central government appointed local officials to assuage the pollution problem in the Taihu Lake in the Jiangsu Province in eastern China where blue algae had broken out.
SLIME: Newsham Park lake, where blue algae has formed
Fish stocks include common carp, perch, tench, roach and bream, while two floating aerators have been bought to try to combat the threat of blue algae during hot summers.
They have already created blue algae that produce diesel fuel.