MeSH information in HubMed

Another new icon next to search results in HubMed: this one first fetches MeSH headings matched by the query terms, then displays definition and synonym information for the selected MeSH heading.

MeSH icon

This isn't so useful when searches are sorted by date, as PubMed automatically expands queries to match MeSH headings (see the query summary at the bottom of search result pages), but should be useful when sorting by relevance.