hydrogen ion

noun

1. ionized hydrogen of the form H + , found in aqueous solutions of all acids.

hydrogen ion

noun

1. an ionized hydrogen atom, occurring in plasmas and in aqueous solutions of acids, in which it is solvated by one or more water molecules; proton. Formula: H ⁺

2. an ionized hydrogen molecule; hydrogen molecular ion. Formula: H 2 ⁺

Word History and Origins

Origin of hydrogen ion¹

First recorded in 1895–1900