Definition:
The "National Institutes of Health" (often abbreviated as NIH) is a part of the U.S. government that focuses on studying health and medicine. Its main goal is to use science to learn more about human health and find ways to improve it. The NIH is the main agency in the federal government that conducts research in the field of medicine and health.
"The National Institutes of Health is funding a new study to find better treatments for diabetes."
In more advanced contexts, you might refer to specific divisions or programs within the NIH, such as the National Cancer Institute (NCI) or the National Institute of Mental Health (NIMH), to discuss specialized research areas.
The "National Institutes of Health" is a crucial part of the U.S. health system, dedicated to research and improving health.