The term “crosshead” can refer to a couple of different concepts depending on the context:
1. **In Engineering and Machinery**: A crosshead is a component that connects a piston rod to a crank or connecting rod in engines and various mechanical systems. It usually allows for a smooth movement and conversion of linear motion to rotary motion.
2. **In Construction and Architecture**: A crosshead can refer to a horizontal beam or structural member that spans between two supports, often used in the context of door frames or windows, serving both structural and decorative purposes.
3. **In Printing and Typography**: A crosshead may refer to a line of text that is set apart from the body text, usually used for emphasis or to denote a section heading.
If you have a specific context in mind, please let me know for a more tailored definition!
