endocarp
the inner layer of the pericarp of a fruit (such as an apple or orange) when it consists of two or more layers of different texture or consistency
en-GB/ˈɛndəʊˌkɑːp/
en-US/ˈɛndəˌkɑɹp/
the inner layer of the pericarp of a fruit (such as an apple or orange) when it consists of two or more layers of different texture or consistency