Definitions

1. adjective

relating to or characteristic of the innermost part of an organ or a system, especially in reference to the splanchnic region of the vertebrate body

“The endostylic structure of the heart played a crucial role in pumping blood throughout the body.”

2. noun

a part or region of an organ or system that is situated within its innermost part

“The endostylic tissue in the kidney was damaged due to a viral infection.”