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MedlinePlus: Definitions of Health Terms General Health

Wellness is more than meals and workouts—it starts with knowing what your vitals and body signals actually mean. This official MedlinePlus guide breaks down everyday health terms in plain language so you can read results, track changes, and talk confidently with your care team.

19+
Core terms explained
NIH
Authoritative sources
Free
Public health resource

Why start with these definitions?

Each entry links to respected institutes—so you get accurate context, not search-engine noise.

Decode your numbers

Understand blood pressure readings, BMI categories, BAC limits, and other metrics you see on apps, lab reports, and home devices.

Track with confidence

Learn how basal temperature, cervical mucus, respiratory rate, and similar signals work together when you monitor your health over time.

Official, secure source

MedlinePlus is a U.S. government health information service. Content is written for patients and families, backed by NIH and partner agencies.

A simple path to better health literacy

Four steps you can repeat whenever a new term shows up on a chart or device.

Discover

Pick a term you have seen recently—blood type, weight, UV exposure, or spotting.

Define

Read the MedlinePlus explanation and the cited institute behind it.

Apply

Connect the definition to your own tracking habits or next clinician visit.

Explore

Branch into related MedlinePlus topics on fitness, nutrition, vitamins, and minerals.

Why readers trust MedlinePlus

“Being healthy is about more than diet and exercise. It is also about understanding how your body works and what it needs to stay healthy. You can start by learning these general health terms.”
— MedlinePlus, U.S. National Library of Medicine

Built for public trust

  • An official website of the United States government
  • .gov domains belong to verified U.S. government organizations
  • Secure HTTPS connection—share sensitive health details only on official sites
  • Definitions cite institutes such as NHLBI, NIAAA, and NIH MedlinePlus

Read definitions on MedlinePlus

Make your next checkup conversation clearer

Spend five minutes with MedlinePlus general health definitions—then keep the page bookmarked whenever a new number or term appears.

Go to MedlinePlus: General Health