crosshead

Noun
  1. A heading of a subsection printed within the body of the text (synset 106355699)
    is a type of: head, header, heading - a line of text serving to indicate what the passage below it is about
    same as: crossheading
  2. Metal block that connects to a piston;
    It slides on parallel guides and moves a connecting rod back and forth (synset 103141695)
    is a type of: block - a solid piece of something (usually having flat rectangular sides)
    is a part of: steam engine - external-combustion engine in which heat is used to raise steam which either turns a turbine or forces a piston to move up and down in a cylinder

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