aditus aditus an aditus is the opening to some interior space or cavity. it may refer to: aditus to mastoid antrum, in the ear laryngeal aditus, the opening that connects the pharynx and the larynx omental foramen or aditus, in the abdomen look up aditus in wiktionary, the free dictionary. this article is issued from wikipedia. the text is licensed under creative commons - attribution - sharealike. additional terms may apply for the media files.