thionium

1 of 2

noun

thi·​o·​ni·​um

thīˈōnēəm

plural -s

: sulponium

-thionium

2 of 2

noun combining form

"

plural -s

: onium compound containing sulfur and usually another element (as nitrogen) besides carbon in a ring

phenazathionium

Word History

Etymology

Noun

New Latin, from thi- + -onium

Noun combining form

New Latin, from thi- + -onium

The Ultimate Dictionary Awaits

Expand your vocabulary and dive deeper into language with Merriam-Webster Unabridged.

1. Expanded definitions
2. Detailed etymologies
3. Advanced search tools
4. All ad-free

Discover what makes Merriam-Webster Unabridged the essential choice for true word lovers.

Start Your Free Trial Now