gland

noun5

1. •
   A specialized cell, group of cells, or organ of endothelial origin in the human or animal body that synthesizes a chemical substance, such as hormones or breast milk, and releases it, often into the bloodstream (endocrine gland) or into cavities inside the body or its outer surface (exocrine gland).
2. •
   A secretory structure on the surface of an organ.
3. •
   A structure resembling a gland, especially a lymph node.
4. •
   A stuffing box used to seal a rotating or reciprocating shaft against a fluid.

   • The gland of a tap/faucet is usually packed with string which has been soaked in tallow or similar grease.
5. •
   A compressable cylindrical case and its contents around a shaft where it passes through a barrier, intended to prevent the passage of a fluid past the barrier, used for example around a ship’s propeller shaft or around a tap, valve or faucet.