Definition of "hyponatremia" [hyponatremia]

• A deficiency of sodium in the blood. (noun)

American Heritage(R) Dictionary of the English Language, Fifth Edition. Copyright (c) 2011 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.

• "This imbalance of water to sodium is called hyponatremia."
• "Most recently, Michaels was found to have a side-effect called hyponatremia, which is a lack of sodium in the body that leads to seizures."
• "Although, when you're sweating a lot, it's really important to replace sodium as well as fluids to prevent a potentially serious condition called hyponatremia."