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Webster 1913 Edition
Bascule
Bas′cule
(băs′kū̍l)
, Noun.
[F., a seesaw.]
In mechanics, an apparatus on the principle of the seesaw, in which one end rises as the other falls.
Bascule bridge
, a counterpoise or balanced drawbridge, which is opened by sinking the counterpoise and thus lifting the footway into the air.