BRIDGEHEAD
bridgehead
(noun) a defensive post at the end of a bridge nearest to the enemy
bridgehead, foothold
(noun) an area in hostile territory that has been captured and is held awaiting further troops and supplies; âan attempt to secure a bridgehead behind enemy linesâ; âthe only foothold left for British troops in Europe was Gibraltarâ
Source: WordNet® 3.1
Etymology
Noun
bridgehead (plural bridgeheads)
An area around the end of a bridge.
(military) A fortification around the end of a bridge.
(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.
(chemistry) Either of the two atoms in different parts of a molecule that are connected by a bridge of two or more other atoms
Source: Wiktionary
Bridge"head`, n.
Definition: A fortification commanding the extremity of a bridge nearest
the enemy, to insure the preservation and usefulness of the bridge,
and prevent the enemy from crossing; a tĂȘte-de-pont.
Source: Webster’s Unabridged Dictionary 1913 Edition