Because genomics is an interdisciplinary science that unites biology, chemistry, physics, and mathematics, its language is diverse and includes terms not always found in dictionaries. This site from Cambridge Healthtech Institute of Massachusetts was designed to help scientists keep on top of this complex language. Loads of terms in categories such as basic genetics, functional and structural genomics, informatics, and genomic-related technology are defined here. Users can access the glossary terms either through a short index of major subject headings or by a longer alphabetically-arranged subject list. The Genomics Glossary deserves bonus points for including links to related resources in the text of its definitions. For example, within the definition of "polymerase chain reaction" are links to sites at Yale Medical School and the National Library of Medicine. In addition, links to pages on nomenclature, a bibliography of Web and print resources, and a FAQ page are available at this fantastic Website.