H2O

Save This Word!

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).

QUIZZES

Were you ready for a quiz on this topic? Well, here it is! See how well you can differentiate between the uses of "was" vs. "were" in this quiz.

Question 1 of 7

“Was” is used for the indicative past tense of “to be,” and “were” is only used for the subjunctive past tense.

You meant to chase every glass of wine with a pitcher of H2O, but the holiday cheer somehow steered you off course.
5 Hangover Cures to Save You After a Few Too Many|DailyBurn|December 19, 2014|DAILY BEAST
Rosetta researchers used ROSINA data to determine how much HDO is mixed in with the normal H2O.
Are Comets the Origin of Earth’s Oceans?|Matthew R. Francis|December 14, 2014|DAILY BEAST
This storm's ratios could be as high as 15 or 20:1, meaning there'll be more bang for the H2O buck.
36 Hours of Frozen Fury|Eric Holthaus|January 2, 2014|DAILY BEAST
Another aide literally peered into Harry's glass to verify that the contents really were just New York's finest H2O.
The Reinvention of Prince Harry: Why His U.S. Visit Is a Huge Success|Tom Sykes|May 15, 2013|DAILY BEAST

In 2009 we merged our organizations—H2O Africa and WaterPartners International—to create Water.org.
Matt Damon and Gary White on the Road From TED to World Water Day|Matt Damon, Gary White|March 22, 2013|DAILY BEAST
H2O was, anywhere on the planet, a whitish, crystalline mineral suitable for building material.
Unwise Child|Gordon Randall Garrett
It is easier to wash with ordinary water than with H2O, and there is a marked difference between falling off a building and gt2.
Essays in Experimental Logic|John Dewey
Hence the compound atom or molecule of water, H2O, weighs 18.
The Chemistry of Hat Manufacturing|Watson Smith
Similarly, water a liquid, is made up of two parts of hydrogen and one part of oxygen, represented by the symbol H2O.
The Automobile Storage Battery|O. A. Witte
Next to carbonic acid gas, water (H2O) is the most abundant gaseous product of decomposition.
Manures and the principles of manuring|Charles Morton Aikman