American Heritage® Dictionary of the English Language, Fourth Edition
- n. A nonmetallic element constituting 21 percent of the atmosphere by volume that occurs as a diatomic gas, O2, and in many compounds such as water and iron ore. It combines with most elements, is essential for plant and animal respiration, and is required for nearly all combustion. Atomic number 8; atomic weight 15.9994; melting point -218.4°C; boiling point -183.0°C; gas density at 0°C 1.429 grams per liter; valence 2. See Table at element.
Century Dictionary and Cyclopedia
- n. Chemical symbol, O; atomic weight, 16. An element discovered by Priestley in 1774, who called it dephlogisticated air. It was finally called
oxygenby Lavoisier, because supposed to be present in all acids. Further investigation, however, has proved that this is not the case. Oxygen is a chemical element existing as a permanent gas, colorless, odorless, and tasteless, and somewhat heavier than atmospheric air. It is soluble in water, which at a temperature of 60° F. dissolves of its volume of oxygen. Oxygen combines very readily with most of the elements, and forms oxids with all of them excepting fluorin. The act of combination is so energetic in many cases as to evolve light and heat, the phenomena of combustion. In other cases, as in the tarnishing or rusting of metals and the decay of animal or vegetable substances, oxidation takes place so slowly that, while the result is the same, the heat evolved at one time is not enough to produce luminous effects or even to be sensible. Free or uncombined oxygen is essential to all animal and vegetable life. Animal heat and muscular energy are results of a slow combustion produced in all parts of the system by oxygen carried in the blood from the lungs. In sunlight oxygen is exhaled by growing plants, but a certain quantity is assimilated and is essential to life. Oxygen is the most widely distributed and abundant element in nature; it constitutes about one fifth of the total volume of the atmosphere, which is a mechanical mixture of oxygen and nitrogen. Water contains about 89 per cent. of it by weight, and it is found in most animal and vegetable products, acids, oxids, and salts. The rocks which make up most of the earth's crust contain between 40 and 50 per cent. of oxygen. Under certain conditions oxygen may be made to pass into an allotropic or condensed form called ozone.
- n. A manufacturers' name for bleaching-powder.
- n. A chemical element (symbol O) with an atomic number of 8 and relative atomic mass of 15.9994.
- n. Molecular oxygen (O2), a colorless, odorless gas at room temperature.
- n. medicine A mixture of oxygen and other gases, administered to a patient to help him or her to breathe.
- n. countable An atom of this element.
GNU Webster's 1913
- n. (Chem.) A colorless, tasteless, odorless, gaseous element of atomic number 8, occurring in the free state in the atmosphere, of which it forms about 23 per cent by weight and about 21 per cent by volume, being slightly heavier than nitrogen. Symbol O. Atomic weight 15.9994.
- n. Manufacturing name Chlorine used in bleaching.
- n. a nonmetallic bivalent element that is normally a colorless odorless tasteless nonflammable diatomic gas; constitutes 21 percent of the atmosphere by volume; the most abundant element in the earth's crust
- Borrowed from French oxygène (originally in the form principe oxygène, a variant of principe oxigine ‘acidifying principle’, suggested by Lavoisier), from Ancient Greek ὀξύς (oxus, "sharp") + γένος (genos, "birth"), referring to oxygen's role in the formation of acids. (Wiktionary)
- French oxygène : Greek oxus, sharp, acid; see ak- in Indo-European roots + French -gène, -gen. (American Heritage® Dictionary of the English Language, Fourth Edition)
“He thought that experiments proved all acids to be compounds of the element oxygen; and for many years after Lavoisier, the alchemical expression _the principle of acidity_ was superseded by the word _oxygen_.”
“So, too, they claim that there are two distinct processes carried on by the leaves of plants, -- namely, respiration and digestion: that the first is analogous to the same process in animals; and that by it oxygen is absorbed from, and carbonic acid returned to the atmosphere, though to a limited degree: and that digestion consists in _the decomposition of carbonic acid by the green tissues of the leaves under the stimulus of the light, the fixation of solid carbon, and the evolution of pure oxygen_.”
“a compound containing hydrogen and oxygen in the proportion of 1 part by weight of hydrogen to 7.94 parts by weight of oxygen_.”
“This oxygen comes from the orbiter main oxygen supply while the suit is connected and from a "bail out bottle" after the crewman leaves the seat.”
“By the time the rescuers get to the main collapse area, their oxygen is almost at it limits.”
“I do like steampunk - which is what I call my oxygen concentrator, "Turn on the Steampunk!”
“Plants can form what he calls oxygen (O) roots and water/nutrient (W/N) roots.”
“He does not know anything about what we call oxygen; but it is astonishing how very easy it would be to turn his language into the equivalent of modern chemical theory.”
“The oxygen is fed through a connector at the left thigh, entering the helmet at the base of the neck ring.”
“One part oxygen is drawn together with two parts hydrogen to create water.”
These user-created lists contain the word ‘oxygen’.
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This list, the one shown below this very message, is a collection of words that you cannot begin to fathom how much I adore. The list will also feature atithesis and contrasting words such as the t...
Very basic words for ESL students.
something that produces; origin; denoting a substance
Note: Also -genesis
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