fothergilla
- n any of several deciduous low-growing shrubs of the genus Fothergilla having showy brushlike spikes of white flowers in spring and fiery red and orange autumn color; grows from Alabama to the Allegheny Mountains
- n small genus of deciduous shrubs of the southeastern United States
foucault
- n 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)
foucault pendulum
- n pendulum with a long wire; can swing in any direction; the change in the swing plane demonstrates the earth's rotation