Meaning of crosshead

cross•head

Pronunciation: (krôs'hed", kros'-), [key]
— n.
  1. a title or heading filling a line or group of lines the full width of the column.
  2. a sliding member of a reciprocating engine for keeping the motion of the joint between a piston rod and a connecting rod in a straight line.
  3. a crosspiece on a rudderpost by which the rudder is turned.
  4. a transverse timber for transmitting the lifting effort of two or more jackscrews supporting it to the foot of a shore that it supports. Cf. shore (def. 1).
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.
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