Test your knowledge - and maybe learn something along the way.
TAKE THE QUIZiodonium
noun
io·do·ni·um
ˌīəˈdōnēəm
plural -s
: the univalent cation H2I+ derived from hydrogen iodide and known only in disubstituted form
Love words? Need even more definitions?
Merriam-Webster unabridged
Share