- Abnormally low concentration of sodium ions in blood.
The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
Examples from the Web for hyponatremia
The organizations annually update topics such as hyperthermia, hypothermia and hyponatremia.
In simple terms, hyponatremia is reduced blood sodium concentration.