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
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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)