A pilonidal cyst is a unique kind of abscess that occurs in or above the crease of the buttocks. Pilonidal cysts often begin as tiny areas of infection in the base of the area of skin from which hair grows (the hair follicle).
Cofferdam A cofferdam is a temporary enclosure built within, or in pairs across, a body of water and constructed to allow the enclosed area to be pumped out, creating a dry work environment for the major work to proceed.
Definition of guaranty. plural. guaranties. 1 : an undertaking to answer for the payment of a debt or the performance of a duty of another in case of the other's default or miscarriage. 2 : guarantee 3. 3 : guarantor. 4 : something given as security (see security 2) : pledge used our house as a guaranty for the loan.