Morpheme
-ium
Type
suffix
Denotation
(1) chemical suffix naming metal elements, isotopes of hydrogen, polyatomic cations; (2) denotes a structure or category
Etymology
Latin adjectival suffix -ium, from -ius
Evidence
aquarium, brevium, borium, cadmium, calcium, chromium, consortium, delirium, emporium, equilibrium, fermium, gymnasium, helium, lithium, melodium, plutonium, proscenium, reptilium, stadium, strangeonium, thorium, uranium
