The new AGROVOC web service, called getTermExpansion, is intended to be used for expanding queries in search engines. The web service takes a single AGROVOC term or an 'AND' or 'OR' concatenated search query and looks up synonyms of the AGROVOC term(s) in AGROVOC. In case of synonyms, the web service returns the initial query with the found synonyms added using 'OR' boolean concatenation. If there is no language submitted, then the expansion is done with the language of the term. This functionality may be used, for example, to submit a more expanded query to a lucene-based search engine.