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.
A pterygium is a non-cancerous growth of tissue that forms on the conjunctiva. Normally the conjunctiva is a thin clear membrane over the âwhitesâ of the eye (sclera) and extends to the inner surface of the eyelids.When a pterygium is present, a fleshy mass is felt or seen on the conjunctiva.ymptomsA pterygium is usually visible on the eye surface although sometimes it may not be noticeable. Smaller and less prominent lesions tend to appear like a little bump on the conjunctiva. However, larger lesions may be significantly elevated with a white to reddish appearance.