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.
Glossary of Municipal Securities Terms. NON-APPROPRIATION CLAUSE. A provision of a bond contract that allows the lessee or borrower to terminate certain obligations under a long-term certificate of participation or other revenue obligation financing if the appropriating body does not appropriate funds for the lease payments.