Definition of -ium in English:



  • 1Forming nouns adopted unchanged from Latin (such as alluvium) or based on Latin or Greek words (such as euphonium).
  • 2 (also -um) Forming names of metallic elements: cadmium magnesium
  • 3Denoting a region of the body: pericardium
  • 4Denoting a biological structure: mycelium


modern Latin in sense 2, sense 3, sense 4, via Latin from Greek -ion.

More definitions of -ium

Definition of -ium in:

Get more from Oxford Dictionaries

Subscribe to remove adverts and access premium resources

More on -ium

Nearby words

Word of the day skosh
Pronunciation: skəʊʃ
a small amount; a little