External Auditory Meatus (EAM)
Here's your citation in American Psychological Association (APA) format:
External Auditory Meatus (EAM). (n.d.). In Alleydog.com's online glossary. Retrieved from: https://www.alleydog.com/glossary/definition-cit.php?term=External+Auditory+Meatus+%28EAM%29