What is the meaning of Crosshead?

A metal beam that connects a piston to a connecting rod in an engine.

Large text, like a headline but typically drawn from the article, placed partway through the article to break it up visually.

A screw with a cross-shaped indentation for gripping and turning, as opposed to a flathead.

A note with an x-shaped notehead, indicating a non-tonal sound such as a drumbeat or a rapped syllable.

Source: wiktionary.org