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bridgehead noun

  /ˈbɹɪd͡ʒhɛd/
  • (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.
  • (physical chemistry) Either of the two atoms in different parts of a molecule that are connected by a bridge of two or more other atoms
 ceann droichid
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