endomesoderm

noun

en·​do·​me·​so·​derm ˌen-dō-ˈmez-ə-ˌdərm  -ˈmēz- 

-ˈmēs-, 

-ˈmes-

: an embryonic blastomere or cell layer not yet differentiated into mesoderm and endoderm but destined to give rise to both

called also mesendoderm

endomesodermal

-ˌmez-ə-ˈdər-məl  -ˌmēz- 

-ˌmēs-, 

-ˌmes-

adjective