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.

a term used to qualify or modify MeSH headings as a way of targeting a specific aspect of the subject.

A secondary heading, used in the subdivision of a subject. In a verbal heading it is the second or subsequent word, separated from the preceding by punctuation.

a heading of a subdivision of a text