- of or relating to sulfur.
Origin of thionic
1875–80; < Greek theîon sulfur + -ic
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018
- of, relating to, or containing sulphur
- Of, relating to, containing, or derived from sulfur.
The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.