endostome
noun
en·do·stome
ˈendəˌstōm
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
Word History
Etymology
International Scientific Vocabulary end- + -stome; probably originally formed in French