crosshead: Meaning and Definition of

cross•head

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).