Foucault pendulum

foucault-pendulum的词性：
n.（名词）

1. A simple pendulum suspended from a long wire and set into motion along a meridian. The plane of motion appears to turn clockwise in the Northern Hemisphere and counterclockwise in the Southern Hemisphere, demonstrating the axial rotation of the earth.
佛科摆：悬吊于一根长线下的单摆，使之沿着子午线经线圈运动。运动的平面在北半球呈顺时针，南半球呈逆时针，从而证实了地球的自转

foucault-pendulum的词源：

2. After &B{Jean Bernard L} Foucaultéon
源自 &B{简·伯纳德L} Foucaultéon