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endexine

noun
end·​ex·​ine | \ (ˌ)en-ˈdek-ˌsēn How to pronounce endexine (audio) , -ˌsīn\

Definition of endexine

: an inner membranous layer of the exine

First Known Use of endexine

1947, in the meaning defined above

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The first known use of endexine was in 1947

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