Wheatstone's rods

Wheat´stone's rods


1.(Acoustics) Flexible rods the period of vibration of which in two planes at right angles are in some exact ratio to one another. When one end of such a rod is fixed, the free end describes in vibrating the corresponding Lissajous figure. So called because devised by Sir Charles Wheatstone.
Webster's Revised Unabridged Dictionary, published 1913 by G. & C. Merriam Co.