posterior ethmoidal posterior ethmoidal posterior ethmoidal may refer to: posterior ethmoidal artery, an artery of the head which supplies the nasal septum posterior ethmoidal foramen posterior ethmoidal nerve, a branch of the nasociliary nerve ethmoidal veins, the venae comitantes of the ethmoidal arteries this article is issued from wikipedia. the text is licensed under creative commons - attribution - sharealike. additional terms may apply for the media files.