-ium


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-ium

1 suffix used to name metallic elements: radium, sodium.
2 suffix for quaternary ammonium derivatives.

-ium

Combining form usually denoting a natural element (e.g., polonium).

-ium

[L. -ium, neuter noun suffix]
1. A suffix used in chemistry for names of elements, e.g., einsteinium.
2. A suffix used as a Latinization of the Greek suffix-ion, e.g., endoneurium