An ion having both a negative and a positive charge, each localized at a different point in the molecule, which thus has both positive and negative poles.zwitterion
Read more in this article about some frequently asked questions and fun facts related to our definitions.
If you see an odd glow in the sky tonight, here’s what it’s called and its cause
You’ve heard of the northern lights? The next few days you may be able to see lights even if you aren’t that far north. The sun erupted on Sunday, spewing plasma, “a highly ionized gas containing an approximately equal number of positive ions and electrons” right in our direction. There’s no reason to freak out; solar storms are relatively common, and the most significant impact they have on …
The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.