Genioplasty
The Century Dictionary and Cyclopedia
noun.
I
surgery
, the operation of restoring the chin.
noun.
Operative restoration of a portion of the cheek which is lacking.
Wiktionary, Creative Commons Attribution/Share-Alike License
noun.
mentoplasty
Word Usage
"Just a nervous breakdown from four years of mornings with triplets, afternoons operating on patients who were still whining that the cost of genioplasty should include a freebie chin cleft even as they were going under anesthesia."