tinner

From tin +‎ -er.

tinner (plural tinners)

2. A tinsmith.
4. A worker in a tin mine.
   • 1765–1769, William Blackstone, Commentaries on the Laws of England, (please specify |book=I to IV), Oxford, Oxfordshire: […] Clarendon Press, →OCLC:

     The stannary courts of Devonshire and Cornwall, for the administration of justice among the tinners therein, are also courts of record.

5. (Cornwall) The pied wagtail.
   • 2022, John Coulson Tregarthen, Wild Life at the Land's End:

     The country-people say that the "tinner," that is the "dishwasher" or water-wagtail, is scarcer than it was before the blizzard, which must have caused the death of tens of thousands of birds. They call it the tinner, because it builds its nest in the mouth of the old mine-shafts.

• intern, netrin