Artificial intelligent assistant

stick-in

stick-in, a.
  [f. vbl. phrase stick in: see stick v. 31.]
  That is inserted. stick-in piece: a small piece of metal sometimes inserted in the notched ends of bars when making a butt-joint.

1843 Holtzapffel Turning I. 221 The butt joint is materially strengthened, when..it is..notched in on three or four sides, and pieces called stick-in pieces, dowels, or charlins..are..laid in the notches.

Oxford English Dictionary

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