1. Plural of euglenoid; single-celled organisms that are flagellated protists, typically found in freshwater and capable of both photosynthesis and heterotrophic feeding.
Usage: biology; scientific

Examples

• Euglenas are commonly observed in pond water under a microscope.
• The biology class studied euglenas as examples of organisms that blur the line between plants and animals.
• Euglenas use their flagella to move through water in search of light and nutrients.
• Many euglenas contain chloroplasts, allowing them to photosynthesize when light is available.
• In the absence of light, euglenas can switch to consuming organic matter as an alternative food source.