crosshead
UK[ˈkrɒsˌhɛd]US[ˈkrɔːsˌhɛd]
n
a bar or block, typically in the shape of a cross, fixed at the end of a piston rod in a steam engine or pump to connect it to the connecting rod.
n
a heading within a printed text, set in the body of a column and usually centered.
Morpheme Breakdown
cross
head
cross
cross
head
top part
Etymology
the compound word "crosshead" is a transparent formation from two native english elements. "cross," derived from latin via old english, denotes the intersecting shape, while "head," from old english, signifies an extremity or prominent part. in mechanical engineering, it literally describes the cross-shaped fitting at the head of a piston rod. its typographical sense logically extends this idea to a heading that stands out at the top of a section of text, often centered like the intersection of a cross. the word's meaning is directly built from the literal combination of its two constituent parts.
Analysis
Structure: cross (cross) + head (top part)
cross: from old english 'cros', ultimately from latin 'crux, crucis'. functions as the core noun/adjective denoting the shape or concept of a cross.
head: from old english 'hēafod', of germanic origin. functions as a noun meaning the top, front, or main part of something.
Examples
the crosshead translates the linear motion of the piston into the rotary motion of the crankshaft.
the chapter was divided by several bold crossheads.
the mechanic inspected the worn crosshead pin for damage.