Definition of -ium

1. Suffix. Used to form the names of metal elements, after the style of early-named elements, as well as the isotopes of hydrogen. ¹

2. Suffix. By extension, appended to common words to create scientific-sounding or humorous-sounding fictional substance names. ¹

3. Suffix. Used to indicate the setting where a given activity is carried out: gymnasium, auditorium, stadium, colloquium, planetarium, podium, sanatorium. Words so formed often take "-a" for the plural. ¹

¹ Source: wiktionary.com

Lexicographical Neighbors of -ium

-ious
-isation
-ise
-ish
-ism
-ist
-ista
-istic
-istical
-istically
-ite
-itis
-itol
-itude
-ity
-ium (current term)
-ive
-ization
-ize
-izzle
-ja
-k
-k-
-ki-
-kin
-kin-
-kind
-kinesis
-kins
-lalia

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