Gain access to thousands of additional definitions and advanced search features—ad free! JOIN NOW
: an ion charged both positively and negatively (as that of an amino acid in solution) : an amphoteric ion
the dipolar ion +H3NCH2COO− of glycine
— called also
— compare betaine sense 1a, inner salt
— called also
You must — there are over 200,000 words in our free online dictionary, but you are looking for one that’s only in the Merriam-Webster Unabridged Dictionary.
Start your free trial today and get unlimited access to America's largest dictionary, with:
Share dipolar ion
Resources for dipolar ion
Comments on dipolar ion
What made you want to look up dipolar ion? Please tell us where you read or heard it (including the quote, if possible).
exaggeratedly or childishly emotional
Get Word of the Day daily email!
Words from Greek and Roman Mythology Quiz
Test your visual vocabulary with our 10-question challenge!
Test Your Knowledge - and learn some interesting things along the way.
Subscribe to America's largest dictionary and get thousands more definitions and advanced search—ad free!
Just add an 'E.'
And if so, what about 'never'?
Words from the week of 10/19/2018
The same, but different
And is one way more correct than the others?
The story of an imaginary word that managed to sneak past our editors and enter the dictionary.
How to use a word that (literally) drives some people nuts.
The awkward case of 'his or her'
A mythological/etymological mashup!
Words to improve your Scrabble game
Build a chain of words by adding one letter at a time.