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.
What is Underarm Surgery (Brachioplasty)? Underarm surgery or brachioplasty, more commonly known as an arm lift, is a surgical procedure which tightens loose, sagging skin and removes excess fat deposits in the upper arm that develop with age or significant weight loss.