A glossary of medical laboratory tests is available from the MedicineNet website, which has a comprehensive alphabetical list of procedures and tests. It includes basic and advanced search options.
Medicinenet.com has detailed information about the laboratory tests that may be performed by a doctor, including the reason they are performed, what they indicate, and their normal values.
Another good resource with an exhaustive index of glossary terms is Lab Tests Online. This website contains definitions of medical conditions and the tests used to diagnose them. It also explains how the samples for a particular test are collected and why that test is performed.
The U.S. Food and Drug Administration provides a glossary of all approved laboratory tests. It offers a search feature through which the name of the test, the name of the company, the type of test or any other keyword can be input to obtain additional information about the laboratory test.
The website of the California Pacific Medical Center, one of the largest private academic medical centers in California, is another good resource for a glossary of common laboratory tests and what they mean. The tests are grouped and listed by name, in alphabetical order, to make them easy to look up.