Documentation for JIRA 6.4 (This documentation includes the project navigation sidebar). Not using this? See below:
(JIRA 6.4 without sidebar documentation | JIRA 6.3.x documentation | JIRA Cloud documentation | earlier versions of JIRA)

Versions Compared

Key

  • This line was added.
  • This line was removed.
  • Formatting was changed.

...

Anchor
stemming
stemming

Word stemming

Word Since JIRA cannot search for issues based on parts of words (see below), word 'stemming' allows you to retrieve issues from a search based on the 'root' (or 'stem') forms of words instead of exact matches with specific forms of these words. The number of issues retrieved from a search based on a stemmed word is typically larger, since any other issues containing words that are stemmed back to the same root, will also be retrieved in the search results.

...