noun. minute single-celled green freshwater organism having a single flagella; often classed as algae.
1. Noun, singular or mass One idea is to purchase euglena or other single-celled bacteria and subject them to magnetic fields, all while observing their reactions under a microscope. 2. Adjective The one exception to this is the euglena division of algal protists, which does not reproduce sexually, only asexually by dividing longitudinally.