-onium
Save This Word!
Chemistry.
a suffix used in the names of complex cations: oxonium.
QUIZZES
THINK YOU’VE GOT A HANDLE ON THIS US STATE NICKNAME QUIZ?
Did you ever collect all those state quarters? Put them to good use on this quiz about curious state monikers and the facts around them.
Question 1 of 8
Mississippi’s nickname comes from the magnificent trees that grow there. What is it?
Origin of -onium
Extracted from ammonium
Words nearby -onium
onionskin, onion snow, onion weed, Onitsha, on its merits, -onium, onium compound, Onkelos, on key, onkus, onlap
Dictionary.com Unabridged
Based on the Random House Unabridged Dictionary, © Random House, Inc. 2021
Example sentences from the Web for -onium
This is a situation which agrees with no other city in all Egypt, except that which was the Onium of the later Jews.
Medical definitions for -onium
-onium
suff.
Containing a positively charged radical:carbonium.
The American Heritage® Stedman's Medical Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.