CINAHLstands for the Cumulative Index to Nursing and Allied Health Literature. It's the most comprehensive database for nursing and contains access to the full text of over 1,300 journals, as well as books and book chapters, dissertations, conference proceedings, and standards of practice.
CINAHL subject headings are assigned to every item in the database and are used to describe the content of an article. There are over 14,000 subject headings which are arranged in a hierarchy, also known as a tree structure.This hierarchy allows for browsing broader, narrower, or related terms.
For example in this view of the CINAHL Headings, Infection Control is a broad term and Handwashing and Sterilization and Disinfection are narrower, or more precise, terms.
In CINAHL an abbreviated list of subject headings show on the search results screen.