Look up a word by its first letter:
Genetics Home Reference obtains definitions from several sources.
- Unified Medical Language System at the National Library of Medicine
- Human Genome Project Information at the U.S. Department of Energy
- Merriam-Webster's Medical Dictionary by Merriam-Webster Inc.
- GeneReviews from the University of Washington and the National Center for Biotechnology Information
- Dictionary of Cancer Terms from the National Cancer Institute
- Talking Glossary of Genetic Terms from the National Human Genome Research Institute
See also Understanding Medical Terminology.