earprint

ear +‎ print

earprint (plural earprints)

1. The mark or impression left by an ear pressed against a surface.
   • 2005, Terrence F. Kiely, Forensic Evidence: Science and the Criminal Law, Second Edition, page 369:

     Understand that European forensic specialists have not rejected earprint expertise, but on the contrary, continue to write about it and include its discussion in international forensic conferences.

• pretrain, terrapin