名詞 bascule:

1. a structure or device in which one end is counterbalanced by the other (on the principle of the seesaw)

bas.cule

n.（名詞）
A device or structure, such as a drawbridge, counterbalanced so that when one end is lowered the other is raised.
平衡裝置：一種裝置或結(jié)構(gòu)，比如吊橋，當(dāng)一端末端降下時(shí)，另一邊就升起，使保持平衡

來源：
French [seesaw]
法語(yǔ) [蹺蹺板]
bas [low] from Medieval Latin bassus
bas [低的] 源自 中世紀(jì)拉丁語(yǔ) bassus
cul [bottom] from Latin côlus [rump] * see (s)keu-
cul [底部] 源自 拉丁語(yǔ) côlus [鳥獸的臂部、尾梢] *參見 (s)keu-