plural noun
En·​do·​sphae·​ra·​ce·​ae | \ˌen(ˌ)dōsfə̇ˈrāsēˌē\

Definition of Endosphaeraceae 

: a family of irregularly shaped unicellular green algae (order Chlorococcales) living as endophytes or parasites within other algae, mosses, or seed plants

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History and Etymology for Endosphaeraceae

New Latin, from end- + sphaer- + -aceae

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