Definition of screw-pin in US English:

screw-pin

noun

  • A threaded pin or rod; specifically (a) one used to adjust the position of something, as in a vice (also figurative); (b) one used to fix something in position or join things together; (c) one used to hold parts of a fractured bone in position.

Origin

Late 16th century; earliest use found in John Blagrave (d. 1611), mathematician. From screw + pin.

Pronunciation

screw-pin

/ˈskruːpɪn/