1) Division 2) Division cyanophyta 
Synonym for Cyanobacteria ... <organism> Modern term for the blue green algae, prokaryotic cells that use chlorophyll on intracytoplasmic membranes for photosynthesis. The blue green colour is due to the presence of phycobiliproteins. Found as single cells, colonies or simple filaments. In Anabaena, in which the cells are arranged as a filame...
(= Blue-green algae) See Cyanobacteria.
[n] - prokaryotic organisms sometimes considered a class or phylum or subkingdom
division Cyanophyta noun prokaryotic organisms sometimes considered a class or phylum or subkingdom; coextensive with the Cyanophyceae: cyanobacteria (blue-green algae)
a phylum, or subkingdom, in the kingdom Monera, comprising the blue-green algae.