Definition of knack. 1  1 : a special ready capacity that is hard to analyze or teach. 2  2a : a clever trick or stratagemb : a clever way of doing something. 3  3 archaic : an ingenious device; broadly : toy, knickknack.
Medical Definition of gingivoplasty. plural. gingivoplasties. : a surgical procedure that involves reshaping the gums for aesthetic or functional purposes.
Gingivitis is a common and mild form of gum disease (periodontal disease) that causes irritation, redness and swelling (inflammation) of your gums. Because gingivitis can be mild, you may not be aware that you have the condition. But it's important to take gingivitis seriously and treat it promptly.