Euglenas are unicellular organisms that belong to the phylum Euglenophyta. They are characterized by their unique shape, which is elongated with a pointed end and a blunt end. There are several synonyms for euglenas, including Euglenoids, Euglenaceae, and Euglenophyceae. These terms are frequently used to describe euglenas in various scientific contexts. Euglenoids is a more general term that encompasses all euglenophytes, including both free-living and parasitic species. Euglenaceae is a family of euglenoids that includes some of the more well-known euglenas, such as Euglena, while Euglenophyceae is a class of euglenoids that includes all species of euglenas.