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hydrogen US English

A colorless, odorless, highly flammable gas, the chemical element of atomic number 1

hydrogen New Oxford Dictionary for Writers & Editors

chemical element of atomic number 1

H in hydrogen US English

A colorless, odorless, highly flammable gas, the chemical element of atomic number 1

hydrogen bomb US English

An immensely powerful bomb whose destructive power comes from the rapid release of energy during the nuclear fusion of isotopes of hydrogen (deuterium and tritium), using an atom bomb as a trigger

hydrogen bond US English

A weak bond between two molecules resulting from an electrostatic attraction between a proton in one molecule and an electronegative atom in the other

heavy hydrogen US English

Another term for deuterium.

hydrogen cyanide US English

A highly poisonous gas or volatile liquid with an odor of bitter almonds, made by the action of acids on cyanides

hydrogen peroxide US English

A colorless, viscous, unstable liquid with strong oxidizing properties, commonly used in diluted form in disinfectants and bleaches

hydrogen sulfide US English

A colorless poisonous gas with a smell of rotten eggs, made by the action of acids on sulfides

sulfureted hydrogen US English

Archaic term for hydrogen sulfide.

cream of tartar US English

A white, crystalline, acidic compound obtained as a byproduct of wine fermentation and used chiefly in baking powder

potassium hydrogen tartrate in cream of tartar US English

A white, crystalline, acidic compound obtained as a byproduct of wine fermentation and used chiefly in baking powder