nitrogen Definition

a nonmetallic chemical element that under standard conditions is a colorless, odorless, inert gas, that constitutes 78 percent of the Earth's atmosphere, and that is used especially in the industrial synthesis of ammonia, as a component of inert atmospheres, and in liquid form as a refrigerant

the difference between nitrogen intake and nitrogen loss in the body or the soil

a continuous series of natural processes by which nitrogen passes successively from air to soil to organisms and back to air or soil involving principally nitrogen fixation, nitrification, decay, and denitrification

a toxic reddish brown gas NO2 that is a strong oxidizing agent, is produced by combustion (as of fossil fuels), and is an atmospheric pollutant (as in smog)

the conversion of atmospheric nitrogen into a combined form (such as ammonia) through chemical and especially biological action (such as that of soil rhizobia)

any of various soil microorganisms that are involved in nitrogen fixation

capable of nitrogen fixation

any of various toxic blistering compounds analogous to mustard gas but containing nitrogen instead of sulfur

a state of euphoria and confusion similar to that of alcohol intoxication which occurs when nitrogen in normal air enters the bloodstream at increased pressure (as in deep-water diving) —called also rapture of the deep

any of several oxides of nitrogen most of which are produced in combustion and are considered to be atmospheric pollutants: such as

nitric oxide

nitrogen dioxide