H2o

Noun1.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
tear, teardrop - a drop of the clear salty saline solution secreted by the lacrimal glands; "his story brought tears to her eyes"
perspiration, sudor, sweat - salty fluid secreted by sweat glands; "sweat poured off his brow"
tap water - water directly from the spigot
body of water, water - the part of the earth's surface covered with water (such as a river or lake or ocean); "they invaded our territorial waters"; "they were sitting by the water's edge"
flake, snowflake - a crystal of snow
binary compound - chemical compound composed of only two elements
atomic number 1, H, hydrogen - a nonmetallic univalent element that is normally a colorless and odorless highly flammable diatomic gas; the simplest and lightest and most abundant element in the universe
atomic number 8, oxygen, O - a nonmetallic bivalent element that is normally a colorless odorless tasteless nonflammable diatomic gas; constitutes 21 percent of the atmosphere by volume; the most abundant element in the earth's crust
bath water - water used for a bath
dewdrop - a drop of dew
dishwater - water in which dishes and cooking utensils are washed
distilled water - water that has been purified by distillation
holy water - water that has been blessed by a priest for use in symbolic purification
ground water, spring water, well water - underground water that is held in the soil and in pervious rocks
hard water - water that contains salts (as calcium and magnesium ions) that limit the formation of lather with soap
ice, water ice - water frozen in the solid state; "Americans like ice in their drinks"
limewater - solution of calcium hydroxide in water used as an antacid
liquid - a substance in the fluid state of matter having no fixed shape but a fixed volume
meltwater - melted snow or ice
brine, saltwater, seawater - water containing salts; "the water in the ocean is all saltwater"
fresh water - water that is not salty
slush - partially melted snow
soft water - water that is not hard (does not contain salts that interfere with the formation of lather with soap)
bilge, bilge water - water accumulated in the bilge of a ship
water of crystallisation, water of crystallization, water of hydration - the water present in hydrated compounds

 

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