A widespread genus of photosynthesizing free-living fresh water flagellates (family Euglinidae). [eu- + G. glene, eyeball]
- E. gracilis an abundant species sometimes used in assaying vitamin B12 concentrations of serum and urine in various types of anemia.
- E. viridis a species that inhabits stagnant pools, often in great numbers.
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eu·gle·na yu̇-'glē-nə n
1) cap a genus of green freshwater flagellates of the order Euglenida often classified as algae
2) any member of the genus Euglena
Medical dictionary. 2011.