subconnate
/ˌsʌbˈkɒneɪt, ˌsʌbˈkɑːneɪt/Definitions
1. verb
to lie in contact with the ventral or upper surface of something
“The embryos were subconnate, developing in close contact with each other.”
2. noun
something that is in contact with the ventral or upper surface of something else
“The subconnate structures played a crucial role in the organism’s development.”