Facial symmetry refers to how similar the two sides of a person's face look. If someone has facial symmetry, both sides of their face, like their eyes, nose, and mouth, are almost identical or balanced. Full definition
Me, I'm skeptical about the business of facial symmetry and beauty. (slaw.ca)
A full oral exam assesses facial symmetry, «bite,» all surfaces inside the mouth, and finally, every surface of every tooth using a dental probe. (catsarespecial.com)
So if facial symmetry is indeed a marker of the beautiful, it may not have a direct role in natural selection. (slaw.ca)