-ium

noun suffix

Definition of -ium

  1. 1 [New Latin, from Latin, ending of some neuter nouns] a :  a chemical element sodiumb :  cation tetrazolium

  2. 2 plural -iums or -ia [New Latin, from Latin, from Greek -ion] :  small one :  mass —especially in botanical terms pollinium


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a rounded knoll or a ridge of ice

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