toolholder

noun
tool·hold·er | \ˈtül-ˌhōl-dər \

Definition of toolholder 

: a short steel bar having a shank at one end by which it is clamped to a machine and a clamp at the other end to hold small interchangeable cutting bits

First Known Use of toolholder

1846, in the meaning defined above

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The first known use of toolholder was in 1846

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