-ιο

See also: ιό, Ίο, and Appendix:Variations of "io"

Greek

Alternative forms

• -ιον (-ion) — Katharevousa

Etymology

Inherited from Ancient Greek -ῐον (-ĭon).

The scientific sense is most likely a semantic loan from New Latin -ium.

Suffix

-ιο • (-io) n (plural -ια)

1. a suffix for forming diminutive nominal suffixes
2. (sciences) a suffix for forming the names of chemicals or scientific materials

   ‎English alkane + ‎-ιο (-io) → ‎αλκάνιο (alkánio)

   ‎English positron + ‎-ιο (-io) → ‎ποζιτρόνιο (pozitrónio)

Declension

Declension of -ιο

	singular	plural
nominative	-ιο (-io)	-ια (-ia)
genitive	-ίου (-íou) -ιου (-iou)	-ίων (-íon) -ιων (-ion)
accusative	-ιο (-io)	-ια (-ia)
vocative	-ιο (-io)	-ια (-ia)