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.
Wiktionary (0.00 / 0 votes) Rate this definition: aqueduct (Noun). An artificial channel that is constructed to convey water from one location to another. aqueduct (Noun). A structure carrying water over a river or depression, especially in regards to ancient aqueducts.Origin: Adapted from the aquaeductus, from aqua + duco; compare the aqueduc. aquÃ©ducqueduct (noun). a canal or passage; as, the aqueduct of Sylvius, a channel connecting the third and fourth ventricles of the brain. Origin: [F. aqueduc, OF. aqueduct (Cotgr.), fr. L. aquaeductus; aquae, gen. of aqua water + ductus a leading, ducere to lead.