homeostasis

/ hoh-mee-oh-STAY-sis /noun

Meaning of homeostasis: The maintenance of stable internal conditions within a living system.

Definition of homeostasis

Homeostasis is the body’s ability to regulate its internal environment within ranges compatible with life. Temperature, blood glucose, fluid balance, and blood pH are examples of variables controlled through homeostatic mechanisms.

How homeostasis is built

homeo stasis homeostasis
  • homo-, homeo- Prefix · Greek same, alike, unchanging
  • -stasis Suffix · Greek stopping, controlling, standing still

A medical term is read from its ending backwards: the suffix first, then the prefix, then the root. See all 223 word parts.

Also known as

physiologic equilibrium

Used in a sentence

Sweating helps preserve temperature homeostasis during exercise.

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Good to know

Homeostasis is dynamic: values fluctuate within regulated ranges rather than remaining perfectly constant.

Word origin

Where “homeostasis” comes from

From Greek homoios, “similar,” and stasis, “standing still.”

For learning, not diagnosis. This glossary provides general educational information and is not a substitute for advice from a qualified healthcare professional. If you may be experiencing a medical emergency, contact local emergency services.