from The American Heritage® Dictionary of the English Language, 4th Edition
- n. See cyanobacterium.
from Wiktionary, Creative Commons Attribution/Share-Alike License
- n. Any member of the cyanobacteria; a primitive photosynthetic organism similar to bacteria which is thought to have generated the first oxygen in the Earth's atmosphere.
from the GNU version of the Collaborative International Dictionary of English
- any of a group of photosynthetic microorganisms possessing characteristics of both bacteria and plants. When classed as bacteria, they are assigned to the Cyanobacteria; when classed as plants, they are assigned to the Cyanophyta. They are now known to be prokaryotic, and are usually called cyanobacteria in technical contexts. See cyanobacterium.
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