a steel instrument consisting of a stem with two prongs, producing a musical tone of definite, constant pitch when struck, and serving as a standard for tuning musical instruments, making acoustical experiments, and the like.
a two-pronged metal fork that when struck produces a pure note of constant specified pitch. It is used to tune musical instruments and in acoustics
narrow, two-pronged steel bar that when tuned to a specific musical pitch retains its tuning almost indefinitely. It was apparently invented by George Frideric Handel's trumpeter John Shore shortly before Shore's death in 1752.
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Encyclopedia Britannica, 2008. Encyclopedia Britannica Online.
Forms of figurative sculpture became the epoch's artistic tuning fork.
People would concentrate for hours on the pitch of a tuning fork.