nitrogenase /nī-trojˈə-nāz/ noun

An enzyme complex that catalyses nitrogen fixation

nitrogenizāˈtion or nitrogenisāˈtion noun

nitrogenize or nitrogenise /-trojˈ/ transitive verb

To combine or supply with nitrogen

nitrogˈenous adjective

Of or containing nitrogen

nitrogen cycle noun

The sum total of the transformations undergone by nitrogen and nitrogenous compounds in nature, circulating between the atmosphere, soil and living organisms, from free nitrogen back to free nitrogen

nitrogen dioxide noun

A poisonous gas (NO₂) with a pungent smell

nitrogen fixation noun

The formation of compounds from free atmospheric nitrogen, either naturally (by lightning, ultraviolet radiation or the action of bacteria) or by an industrial process, eg to make fertilizers

nitrogen monoxide same as nitric oxide (see under nitre).

nitrogen mustard noun

Any of several compounds with a molecular structure resembling that of a mustard gas, used in cancer treatments

nitrogen narcosis noun

The intoxicating and anaesthetic effect of too much nitrogen in the brain, experienced by divers at considerable depths (also called rapture of the deep or rapture of the depths and (slang) the narks)