a suffix used in the names of complex cations: oxonium.
TAKE ROUND 2 OF OUR PSAT VOCABULARY QUIZ!
Here is our second set of teacher-selected PSAT vocabulary words. Do you know the meanings of these terms?
Question 1 of 10
Origin of -onium
extracted from ammonium
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2020
Medical definitions for -onium
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.