| NOUN | person | Jean Bernard Leon Foucault, Foucault | French physicist who determined the speed of light and showed that it travels slower in water than in air |
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| Meaning | French physicist who determined the speed of light and showed that it travels slower in water than in air; invented the Foucault pendulum and the gyroscope (1819-1868). | |
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| Synonym | Foucault | |
| Instance of | physicist | A scientist trained in physics |
| Spanish | Jean Bernard Leon Foucault | |
| Catalan | Foucault | |
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