H2o Definition & Meaning

Definition

Examples

Related Words

Synonyms H2O Cultural

1. The chemical symbol (see also symbol) for water. Each molecule of water contains two atoms of hydrogen (H) joined to a single atom of oxygen (O).

Example Sentences

Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.

"If we're going to send humans to Mars, you need H2O and not just for drinking, but for propellant and all manner of applications," Luzzi said.

From Science Daily

H2O is the stuff of life, but for several decades, water producers and sommeliers have been working to make it something more: the stuff of taste.

From The Wall Street Journal

He has denied the existence of Covid, questioned the moon landing and claims that water is something other than H2O.

From BBC

Here, at depths of 5km, where no sunlight can penetrate, the oxygen appears to be produced by naturally occurring metallic “nodules” which split seawater - H2O - into hydrogen and oxygen.

From BBC

However, in interaction with proteins, D2O is less potent than H2O.

From Science Daily

Related Words

• drink
• rain

Definitions and idiom definitions from Dictionary.com Unabridged, based on the Random House Unabridged Dictionary, © Random House, Inc. 2023

Idioms from The American Heritage® Idioms Dictionary copyright © 2002, 2001, 1995 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company.