H2O

noun
\ˈāch-ˈtü-ˈō \

Definition of H2

: water sense 1a American lawns and gardens drink up H2O at alarming rates, especially in the dry West, where more than 50% of residential water is used for landscaping.— Bryan Walsh

First Known Use of H2O

1879, in the meaning defined above

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Dictionary Entries near H2O

h

H

H2

H2O

H3

ha

HA

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The first known use of H2O was in 1879

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