crossheading

from The Century Dictionary.

• noun In mining: A passage driven for ventilation from the airway to the gangway, or from one breast through the pillar to the adjoining working.
• noun A roadway driven in the solid, or maintained through old workings, to intersect other haulage-roads diagonally or at right angles.
• noun A roadway driven at less inclination than directly to the rise of the seam.
• noun In printing, a subheading; a title set in the body of the printed matter at the beginning of a subdivision of the treatment.

from the GNU version of the Collaborative International Dictionary of English.

• noun a heading of a subsection printed within the body of the text.

from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.

• noun a heading of a subsection printed within the body of the text