a bridge which has a leaf or leaves (sense 7c) on hinges.

a bridge that may be raised to allow the passage of a boat, e.g. on a canal.

That lifts, in senses of the verb, spec. in lifting-bridge n. a bridge of which either a part or the whole may be drawn up at one end when needful. li…

attributive and in other combinations, as hoisting-apparatus, hoisting-bridge, hoisting-crab, hoisting-engine, hoisting-jack, hoisting-line, hoisti…

(see quot.).

An apparatus acting on the principle of the lever or pulley, whereby one end is raised when the other is depressed; esp. in bascule-bridge n. a kind…

a type of bascule bridge with an elevated pivot point around which the shore end rotates on a bearing when the span is raised, reducing friction…