The American Academy of Family Physicians health care consumer website offers this online dictionary of over 1,300 general medical terms.

• Dorland's Illustrated Medical Dictionary

Hosted by MerckSource, this dictionary is among the most highly regarded resources in its field.

• Medical Dictionary (MedlinePlus)

This section of MedlinePlus provides definitions and pronunciations of medical terms through a searchable form of Merriam-Webster's medical dictionary.

• Medicare Glossary (Centers for Medicare & Medicaid Services)

This glossary explains terms used in the Medicare program.

• Talking Glossary of Genetic Terms

This glossary is very useful when you are looking up genetic disorders. It provides an explanation of many of the terms that are commonly used. You can either read these explanations, or listen to them on your computer.