bridgehead

Etymology

Calque of French tête de pont, equivalent to bridge + head.

noun

  1. An area around the end of a bridge.
  2. (military) A fortification around the end of a bridge.
  3. (military) An area of ground on the enemy's side of a river or other obstacle, especially one that needs to be taken and defended in order to secure an advance.
  4. (chemistry) Either of the two atoms in different parts of a molecule that are connected by a bridge of two or more other atoms

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