onium

2 ENTRIES FOUND:

oni·um

adjective \ˈō-nē-əm\

Definition of ONIUM

:  being or characterized by a usually complex cation

Origin of ONIUM

-onium
First Known Use: 1905

oni·um

adjective \ˈō-nē-əm\   (Medical Dictionary)

Medical Definition of ONIUM

: being or characterized by a usually complex cation <onium salts>

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