plural noun
Eu·gle·na·ce·ae | \ˌyügləˈnāsēˌē\

Definition of Euglenaceae 

: a family of algae (class Euglenophyceae) that includes Euglena and numerous related genera when these are considered to be algae

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History and Etymology for Euglenaceae

New Latin, from Euglena, type genus + -aceae

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exaggeratedly or childishly emotional

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