cross-heads

crosshead

[kraws-hed, kros-]
noun
1.
Printing. a title or heading filling a line or group of lines the full width of the column.
2.
Machinery. 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.
Nautical. a crosspiece on a rudderpost by which the rudder is turned.
4.
Engineering, Building Trades. a transverse timber for transmitting the lifting effort of two or more jackscrews supporting it to the foot of a shore that it supports. Compare shore2 ( def 1 ).

Origin:
1835–45; cross- + head

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Based on the Random House Dictionary, © Random House, Inc. 2014.
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World English Dictionary
crosshead (ˈkrɒsˌhɛd)
 
n
1.  printing a subsection or paragraph heading printed within the body of the text
2.  a block or beam, usually restrained by sliding bearings in a reciprocating mechanism, esp the junction piece between the piston rod and connecting rod of an engine
3.  nautical a bar fixed across the top of the rudder post to which the tiller is attached
4.  a block, rod, or beam fixed at the head of any part of a mechanism

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