bouchonn.
/buːˈʃɒ̃/ A cylindrical brass plug, tubular at the ends, to be inserted in the plate of a watch when the bearings are considerably worn. (The bouchon is a patent article of French manufacture: the English means of effecting the same purpose is called bushing n.2)
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the world > time > instruments for measuring time > watch > [noun] > making watches > tools or materials used in watchmaking
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1881 F. J. Britten Watch & Clockmakers' Handbk. (ed. 4) 160 A bouchon must be selected as small as the pivot will admit.
This entry has not yet been fully updated (first published 1887; most recently modified version published online March 2018).
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