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Longman Dictionary of Contemporary English
The Collaborative International Dictionary
Nitrous

Nitrous \Ni"trous\, a. [L. nitrosus full of natron: cf. F. nitreux. See Niter.]

  1. Of, pertaining to, or containing, niter; of the quality of niter, or resembling it.

  2. (Chem.) Of, pertaining to, or designating, any one of those compounds in which nitrogen has a relatively lower valence as contrasted with nitric compounds.

    Nitrous acid (Chem.), a hypothetical acid of nitrogen HNO2, not known in the free state, but forming a well known series of salts, viz., the nitrites.

    Nitrous oxide. See Laughing gas.

Douglas Harper's Etymology Dictionary
nitrous

c.1600, from Latin nitrosus, from nitrum (see nitre). Originally "of nitre, pertaining to nitre;" more precise use in chemistry (designating a compound in which the nitrogen has a lower valence than the corresponding nitric compound) is from 1780s. Nitrous oxide attested from 1800.

Wiktionary
nitrous

a. 1 (context chemistry English) of, relating to, or derived from nitrogen, especially in which the valence of the nitrogen is lower than that of a corresponding nitric species 2 (context chemistry English) of, or relating to nitrous acid or its derivatives 3 (context mycology biology English) having a sharp odor like ammonia or nitric acid n. (context dentistry informal English) nitrous oxide.

WordNet
nitrous

adj. of or containing nitrogen; "nitric acid" [syn: azotic, nitric]

Wikipedia

Usage examples of "nitrous".

Nothing new rewarded my efforts-only the same depressing mustiness and faint suggestions of noxious odours and nitrous outlines on the floor--and I fancy that many pedestrians must have watched me curiously through the broken panes.

The ground crew returned to their pumps and to their stations and to their work, defueling the gigantic rocket, pumping the nitrous oxide and hypergolic fuels into holding tanks.

I was just one more patient, suffering from nitrous oxide poisoning and overexposure to radiation through being out of armor for over an hour before being retrieved, plus broken ribs and a knock in the head which had put me out of action.

But now I was just one more patient, suffering from nitrous oxide poisoning and overexposure to radiation through being out of armor for over an hour before being retrieved, plus broken ribs and a knock on the head which had put me out of action.

Before I knew what was happening, the little switch below and to the left of my steering wheel snapped down of its own accord, nitrous oxide sped into the Ford Motorsport GT-40 fuel injectors, and the chase was over before it had time to begin.

Once intubated, Luchesi was fed oxygen and nitrous oxide, a mild anesthetic.

Alone, nitrous oxide would not provide sufficiently deep anestheĀ­sia to permit surgery, but the axillary block was also helping.

Wells did this soon after, but apparently did not obtain sufficiently deep anesthesia with nitrous oxide (which is, in any case, not a powerful anesĀ­thetic).

A moment's respite with the dust and nitrous fumes swirling back down the drive, then a roar as the easers on each side shaped the hole.

Sulphurous and Nitrous Foame They found, they mingl'd, and with suttle Art, Concocted and adusted they reduc'd To blackest grain, and into store conveyd: Part hidd'n veins diggd up (nor hath this Earth Entrails unlike) of Mineral and Stone, Whereof to found thir Engins and thir Balls Of missive ruin.

I do not believe that there is a single known psychoactive drug of which some of my friends is not a user/proponent/proselyte, and in the ensuing month I tried at least 3 dosage levels of (in order) marijuana, alcohol, hashish, LSD, STP, PCP, synthetic THC, benzedrine, methedrine, ibogaine, amyl nitrate, Valium, Lib-rium, mescaline (real and synthetic), and psilocybin (likewise), amanita muscaria, peyote, yohimbe bark, ginseng root, nitrous oxide, and 3 others which even the source could not name -- in addition, of course, to my usual caffeine and nicotine.

She frowned against the light, scowling at our bubbling animal flesh, our cubic yard of nitrous.

So the ghoul that was Pickman advised Carter either to leave the abyss at Sarkomand, that deserted city in the valley below Leng where black nitrous stairways guarded by winged diarote lions lead down from dreamland to the lower gulfs, or to return through a churchyard to the waking world and begin the quest anew down the seventy steps of light slumber to the cavern of flame and the seven hundred steps to the Gate of Deeper Slumber and the enchanted wood.

When Sax had been made head of the terraforming project in 2042, he had immediately initiated the construction of factories to produce and release into the atmosphere a special greenhouse gas mix, composed mostly of carbon tetrafluoride, hexafluoroethane, and sulphur hexafluoride, along with some methane and nitrous oxide.

So the plan called for production and release of tons of carbon tetrafluoride, hexafluoroethane, sulfur hex-afluoride, methane, nitrous oxide, and trace elements of other chemicals which helped to decrease the rate at which UV radiation destroyed these halocarbons.