subheading

/S AH0 B HH EH0 D IH0 NG/
noun
  1. 1

    Any of the headings under which each of the main divisions of a subject may be subdivided

  2. 2

    A heading or caption subordinate to a main headline, heading, or title especially when inserted as a divider between sections (as of a newspaper or periodical article or story or text of a book)

Synonyms

Source: https://en.wiktionary.org/wiki/subheading