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.
A conduit that resembles a bridge but carries water over a valley. Classified under: Nouns denoting man-made objects. Hypernyms (aqueduct is a kind of...): conduit (a passage (a pipe or tunnel) through which water or electric wires can pass). conduit that resembles a bridge but carries water over a valley. Classified under: Nouns denoting man-made objects. Hypernyms (aqueduct is a kind of...): conduit (a passage (a pipe or tunnel) through which water or electric wires can pass).