Triangular fossa
Fossa triangularis
Definition
Another curved prominence on the auricula, parallel with and in front of the helix, is called the antihelix; this divides above into two crura (Crura of antihelix), between which is a triangular depression, the fossa triangularis.
References
This definition incorporates text from a public domain edition of Gray's Anatomy (20th U.S. edition of Gray's Anatomy of the Human Body, published in 1918 – from http://www.bartleby.com/107/).