hydrogen ion

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noun

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

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Origin of hydrogen ion

First recorded in 1895–1900

Words nearby hydrogen ion

hydrogen cyanide, hydrogen electrode, hydrogen embrittlement, hydrogen fluoride, hydrogen iodide, hydrogen ion, hydrogenize, hydrogenolysis, hydrogenous, hydrogen peroxide, hydrogen sulfide

Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2023

How to use hydrogen ion in a sentence

In a solution, an acid is a chemical that will release hydrogen ions — atoms with a tiny positive charge.
Let’s learn about acids and bases|Bethany Brookshire|February 23, 2021|Science News For Students
While most hydrogen bonds in water are weak, strong hydrogen bonds similar to the ones found in the bifluoride ions can form in water that contains excess hydrogen ions.
This weird chemical bond acts like a mash-up of hydrogen and covalent bonds|Emily Conover|January 7, 2021|Science News
Methane (chemical formula CH4) is one of the simplest hydrocarbons, which literally means “containing hydrogen and carbon.”
Methane on Mars: Life or Just Gas?|Matthew R. Francis|December 17, 2014|DAILY BEAST
From that, they extracted the ratio of the number of deuterium atoms to the number of hydrogen atoms.
Are Comets the Origin of Earth’s Oceans?|Matthew R. Francis|December 14, 2014|DAILY BEAST

They found that there are roughly 1,900 hydrogen atoms for each deuterium atom in the water on Comet 67P.
Are Comets the Origin of Earth’s Oceans?|Matthew R. Francis|December 14, 2014|DAILY BEAST
Deuterium is an isotope of hydrogen containing a proton and neutron in its nucleus, while normal hydrogen has only a proton.
Are Comets the Origin of Earth’s Oceans?|Matthew R. Francis|December 14, 2014|DAILY BEAST
I have previously drawn attention to the cargo aboard Flight 370, which included a large consignment of lithium-ion batteries.
The Flight 370 Zombie Theory Rises From the Dead|Clive Irving|June 26, 2014|DAILY BEAST
Hydrogen sulphid is easily prepared in the simple apparatus shown in Fig. 30.
A Manual of Clinical Diagnosis|James Campbell Todd
It is allowed to cool, and hydrogen sulphid gas is passed through it for about five minutes.
A Manual of Clinical Diagnosis|James Campbell Todd
Ammonia is a compound of nitrogen and hydrogen, but it cannot be formed by the direct union of these gases.
Elements of Agricultural Chemistry|Thomas Anderson
One morning he found that the amount of hydrogen was scarcely perceptible; still there was water in the pit.
Black Diamonds|Mr Jkai
The older workman reassured them; the carbon was much heavier than oxygen, and even thicker than hydrogen.
Black Diamonds|Mr Jkai

British Dictionary definitions for hydrogen ion

hydrogen ion

noun

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 +

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

Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012