in·ti·ma  (ĭn'tə-mə)  n. pl. in·ti·mae (-mē') or in·ti·mas Anatomy The innermost membrane of an organ or part, especially the inner lining of a lymphatic vessel, an artery, or a vein. [Latin, from feminine of intimus, innermost; see en in Indo-European roots.] in'ti·mal adj. |