Euglenida
noun plural
Eu·gle·ni·da
| \ yü-ˈglē-nəd-ə
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Medical Definition of Euglenida
: an order of protozoans of the subphylum Mastigophora comprising extremely varied flagellates that are typically green or colorless stigma-bearing solitary organisms with one or two flagella emerging anteriorly from a well-defined gullet — see euglenophyta