thionium
noun
thi·o·ni·um
| \ thīˈōnēəm\
plural -s
Definition of thionium
(Entry 1 of 2)
: sulponium
-thionium
noun combining form
\ "\
plural -s
Definition of -thionium (Entry 2 of 2)
: onium compound containing sulfur and usually another element (as nitrogen) besides carbon in a ring
phenazathionium
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