suffix forming nouns denoting esp.: 1 (also -um) names of metallic elements (uranium; tantalum). 2 a region of the body (pericardium; hypogastrium). 3 a biological structure (mycelium; prothallium). [from or after L -ium f. Gk -ion]
-IUM
Meaning of -IUM in English
English main colloquial, spoken dictionary. Английский основной разговорный словарь. 2012