a cell or organ in humans and other animals that synthesizes chemical substances and secretes them for the body to use or eliminate, either through a duct (exocrine gland) or directly into the bloodstream (endocrine gland)

a structure, such as a lymph node, that resembles a gland in form

a cell or organ in plants that synthesizes and secretes a particular substance

a device that prevents leakage of fluid along a rotating shaft or reciprocating rod passing through a boundary between areas of high and low pressure. It often consists of a flanged metal sleeve bedding into a stuffing box