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endostome

noun en·do·stome \ ˈendəˌstōm \
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Definition of endostome

plural -s
1 a : the opening in the inner integument of an ovule having two integuments
b : the inner part of the peristome of a moss
2
[New Latin endostoma]
: endostoma

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Origin and Etymology of endostome

International Scientific Vocabulary end- + -stome; probably originally formed in French

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