(chemistry) Any cation of the general formula R₂X⁺, where X is any halogen.

(chemistry) Any cation of general formula R-O⁺.

plural of ion engine

(medicine) Any of several inherited diseases in which alterations in the control of ion conductance through the central pore of ion channels impair cell functions.

plural of arenium ion

plural of benzenium ion

plural of oxylium ion

The use of a beam of high-energy ions to remove material from a surface

plural of ion mirror

A reflectron.