Nitrogen
51nitrogen narcosis — n a state of euphoria and confusion similar to that of alcohol intoxication which occurs when nitrogen in normal air enters the bloodstream at increased partial pressure (as in deepwater diving) <divers typically begin to experience the… …
52nitrogen fixation — n. 1. the conversion of atmospheric nitrogen into nitrogenous compounds by bacteria (nitrogen fixers) found in the root nodules of legumes and certain other plants, and in the soil 2. the conversion of free nitrogen into nitrogenous compounds of… …
53Nitrogen tribromide — IUPAC name nitrogen tribromide …
54nitrogen-fixing — adj capable of nitrogen fixation <nitrogen fixing bacteria> * * * ni·tro·gen fix·ing (niґtro jən fikґsing) accomplishing nitrogen fixation (see under fixation); said of certain bacteria …
55nitrogen oxide — n. any of various oxides of nitrogen, esp. one contributing to air pollution, as nitrous oxide, nitric oxide, or nitrogen dioxide * * * …
56nitrogen cycle — n. the cycle of natural processes through which atmospheric nitrogen is converted by nitrogen fixation and nitrification into compounds used by plants and animals in the formation of proteins and is eventually returned by decay and… …
57nitrogen oxide — n. any of various oxides of nitrogen, esp. one contributing to air pollution, as nitrous oxide, nitric oxide, or nitrogen dioxide …
58nitrogen base — or nitrogenous base n a nitrogen containing molecule with basic properties esp one that is a purine or pyrimidine …
59nitrogen dioxide — n a poisonous strongly oxidizing reddish brown gas NO2 * * * a brownish, irritant gas, NO2, generated by the decomposition of nitrogen tetroxide or the reaction of metals with concentrated nitric acid. Exposure to heavy concentrations causes lung …
60nitrogen mustard — n any of various toxic blistering compounds analogous to mustard gas but containing nitrogen instead of sulfur esp mechlorethamine * * * see chlormethine * * * 1. mechlorethamine hydrochloride. 2. any of a group of cytotoxic alkylating agents… …
