From the CDC's National Center for Health Marketing, this thesaurus offers plain language equivalents to medical terms, phrases, and references.

A PDF of frequently used terms in public health materials and their common, everyday alternatives in plain language sentences.

Glossary of medical terms available in English, Spanish, or Portuguese.

A project from the University of Michigan Taubman Health Sciences Library. Dictionary allows you to look up high-level medical terms and find plain language alternatives.

To help you avoid complex wording and medical jargon, this word substitution list provides simple alternatives to complicated words and phrases.

A side-by-side list of obscure phrases and their simple alternatives.

Explanation of asthma-related words on WebMD which have been reviewed by a medical doctor.

Definitions of common terms used when talking about vaccines and immunizations.

This glossary is a list of research words and their meanings. The glossary was developed by the Multi-Regional Clinical Trials Center (MRCT).

List of diabetes-related terms and their definitions.

Cancer or palliative care populations. A guide developed to help families talk about cancer and palliative care.

Definitions of common dental and dental insurance terms.

Glossary of terms to help explain health insurance.

Terms related to immunizations and their definitions. List created from Washington State Department of Health.

List from the University of Iowa, derived from the University of Kentucky, of medical terms and their plain language alternatives.

A dictionary of 8,856 terms related to cancer and medicine. This website also provides a widget that you can add to your website to let users look up cancer-related terms they may not know.

The NCI Dictionary of Genetics Terms contains technical definitions for 249 terms related to genetics. These definitions were developed by the PDQ® Cancer Genetics Editorial Board to support the evidence-based, peer-reviewed PDQ cancer genetics information summaries.