AJAX-based ontology browser. Users can browse a complete ontology or a subset of one by clicking on the ''browse'' button from the search form on the main page. The root term(s) of the ontology or subset are shown. Users can navigate the ontology dynamically by clicking on a term to load its children. Selecting a term will display the term name, accession, definition, synonyms and any annotations. Hovering over a term will display its relationship with its parent.