Main Entry: pac·chi·o·ni·an body Pronunciation: "pak-E-'O-nE-&n- Function: noun :ARACHNOID GRANULATION Pacáchiáoáni/"päk-E-'O-nE/, Antonio(1665–1726),Italian anatomist. Pacchioni wrote several papers on the structure and function of the dura mater. In 1705 he published his major treatise on the subject, including a description of the arachnoidgranulations now sometimes called pacchionian bodies.
