CINAHL stands for the Cumulative Index to Nursing and Allied Health Literature. Indexed in the database are over 3,000 nursing and allied health journals, books, dissertations, conference proceedings, standards of practice, and more.
Just like PubMed has standardized Medical Subject Headings (MeSH terms) assigned to each article, CINAHL has CINAHL Headings. They serve the same purpose: to help optomize your search. To browse the entire list of CINAHL Headings, click the CINAHL Headings link in the top left when you're in the CINAHL database.