|
|
 |
|
|
|
|
| Fou·cault pen·du·lum (plural Fou·cault pen·du·lums) |
noun |
|
| Definition: |
| |
pendulum showing earth's rotation: a heavy free-swinging pendulum suspended by a long thin wire, whose plane of motion appears to change as Earth rotates
|
| [Mid-19th century. After Jean-Bernard Léon Foucault] |
|
|
|
