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)
Subheadings are titles that divide part of a piece of writing into shorter sections. a short phrase used as a title for a small part within a longer piece of writing
A secondary heading added to a subject heading, usually following a dash or some other punctuation, to divide entries under the subject into more specific subcategories