auxospore

noun
aux·​o·​spore | \ˈȯksəˌspō(ə)r\
plural -s

Definition of auxospore 

: a reproductive cell in diatoms usually resulting from the union of two smaller cells or their contents and associated with rejuvenescence in cells that have become progressively smaller because of repeated divisions

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History and Etymology for auxospore

International Scientific Vocabulary auxo- + -spore; probably originally formed in German

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