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Noun h2o has 1 sense
water, H2O - binary compound that occurs at room temperature as a clear colorless odorless tasteless liquid; freezes into ice below 0 degrees centigrade and boils above 100 degrees centigrade; widely used as a solvent--1 is a kind of binary compound; liquid
 --1 is a substance of
 --1 has substances: 
--1 has particulars:|  | tear, teardrop; perspiration, sweat, sudor; dewdrop; snowflake, flake; ice, water ice; ice crystal, snow mist, diamond dust, poudrin, ice needle, frost snow, frost mist; body of water, water | 
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