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Definition: water from Dictionary of Energy

Chemistry. H2O, a colorless, odorless, tasteless liquid having a melting point of 0°C and a boiling point of 100°C at standard atmospheric pressure, and having the allotropic forms of ice (solid) and steam (vapor). The most commonly found substance on earth and present in many other substances, including all organic tissues.

water

From The Hutchinson Unabridged Encyclopedia with Atlas and Weather Guide
Chemical compound of hydrogen and oxygen elements – H 2 O. It can exist as a solid (ice), liquid (water), or gas (water vapour). Water is the most common compound on Earth and vital to all living organisms. It covers 70% of the Earth's surface, and provides a habitat for large numbers of aquatic organisms. It is the largest constituent of all living organisms – the human body consists of about 65% water. It is found in all cells and many chemicals involved in processes such as respiration and photosynthesis need to be in solution in water in order to react. Pure water is a colourless, odourless, tasteless liquid which freezes at 0°C/32°F, and boils at 100°C/212°F. Natural water in the environment is never pure and always contains a variety of dissolved substances. Some 97% of the Earth's water is in the oceans; a further 2% is in the form of snow or ice, leaving only 1% available as freshwater for plants and animals. The recycling and circulation of water through the biosphere is…
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A huge wave breaks as surf on the shore,...
Despite its commonplace occurrence and familiarity, water is a unique compound and one on which all life on Earth depends. Its physical and chemical properties shape the face of the planet, determine the nature of our climate, and support all life on land and in the oceans. The physical properties…
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From Philip's Encyclopedia
(H 2 O) Odourless, colourless liquid that covers about 70% of the Earth's surface and is the most widely used solvent. Essential to life, it makes up 60-70% of the human body. It is a compound of hydrogen and oxygen, with the two H-O links of the molecule forming an angle of 105°. This asymmetry…
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From The Columbia Encyclopedia
odorless, tasteless, transparent liquid that is colorless in small amounts but exhibits a bluish tinge in large quantities. It is the most familiar and abundant liquid on earth. In solid form (ice) and liquid form it covers about 70% of the earth's surface. It is present in varying amounts in the…
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Full text Article water

From The Oxford Companion to Food
after oxygen, is the principal requirement of the human body; this consists mainly of water, and water has a function in all its tissues and all chemical actions within it. The amount of water required by an individual in a day depends on many variables (size, level of activity, ambient…
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From Library of Health and Living: The Encyclopedia of Nutrition and Good Health
A clear, colorless, odorless liquid that is essential for all life forms. Water is the most abundant nutrient in the body. More water is needed daily than any other nutrient because cells contain mainly water. A human embryo represents about 98 percent water; an infant's weight is about 75 percent…
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From Encyclopedia of World Trade: From Ancient Times to the Present Full text Article A-Z Entries
Central to the existence of life on the planet, water has played, and continues to play, a critical role in world trade. As a vital component to multiple human endeavors, water's role in history is as ubiquitous as its presence on the planet. At the most basic levels of human enterprise, water in…
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From Gale Encyclopedia of Public Health
A radial flow settler at a wastewater treatment...
Water is a chemical compound consisting of two atoms of hydrogen bonded with one atom of oxygen. It is the only substance that can be found in nature in all three forms, solid (ice), liquid (water), and gas (water vapor). Water makes Earth distinctive among all the known planets because Earth alone…
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From QFinance: The Ultimate Resource
Water and the Global Economic Downturn Water is an essential requirement of life, as well as of economic development. Given its essential nature, the provision of water is generally highly regulated in most countries. Some countries, the United Kingdom, for example, create social tariffs to reduce…
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From Encyclopedia of Islam and the Muslim World
© EIRIK HOYDEN A Newly Built Sabil or Siqaya...
Because of its origin in a part of the world that is hot and arid and receives limited rainfall, water has a unique position in the central texts and deep structures of the Islamic tradition. Although also seen as a natural element that can be destructive and devastating, water in the Islamic…
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From Wiley Blackwell Encyclopedias in Social Sciences: The Wiley-Blackwell Encyclopedia of Urban and Regional Studies
While most people in cities today enjoy fresh water, access to quality and affordable water supplied regularly for much of the urban population is lacking. The situation is getting worse, even for residents of water abundant cities. In such cities, not everyone is thirsty, however. The rich get more…
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