an·​iso·​spore | \(ˈ)aˈnīsəˌspō(ə)r\
plural -s

Definition of anisospore 

: a sexual spore exhibiting sexual dimorphism especially of size opposed to isospore

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First Known Use of anisospore

1887, in the meaning defined above

History and Etymology for anisospore

anis- entry 1 + spore

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The first known use of anisospore was in 1887

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living or existing for a long time

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