Inch of water
Water Wa"ter (w[add]"t[~e]r), n. [AS. w[ae]ter; akin to OS. watar, OFries. wetir, weter, LG. & D. water, G. wasser, OHG. wazzar, Icel. vatn, Sw. vatten, Dan. vand, Goth. wat[=o], O. Slav. & Russ. voda, Gr. 'y`dwr, Skr. udan water, ud to wet, and perhaps to L. unda wave. [root]137. Cf. {Dropsy}, {Hydra}, {Otter}, {Wet}, {Whisky}.] 1. The fluid which descends from the clouds in rain, and which forms rivers, lakes, seas, etc. ``We will drink water.'' --Shak. ``Powers of fire, air, water, and earth.'' --Milton. [1913 Webster]

Note: Pure water consists of hydrogen and oxygen, {H2O}, and is a colorless, odorless, tasteless, transparent liquid, which is very slightly compressible. At its maximum density, 39[deg] Fahr. or 4[deg] C., it is the standard for specific gravities, one cubic centimeter weighing one gram. It freezes at 32[deg] Fahr. or 0[deg] C. and boils at 212[deg] Fahr. or 100[deg] C. (see {Ice}, {Steam}). It is the most important natural solvent, and is frequently impregnated with foreign matter which is mostly removed by distillation; hence, rain water is nearly pure. It is an important ingredient in the tissue of animals and plants, the human body containing about two thirds its weight of water. [1913 Webster]

2. A body of water, standing or flowing; a lake, river, or other collection of water. [1913 Webster]

Remembering he had passed over a small water a poor scholar when first coming to the university, he kneeled. --Fuller. [1913 Webster]

3. Any liquid secretion, humor, or the like, resembling water; esp., the urine. [1913 Webster]

4. (Pharm.) A solution in water of a gaseous or readily volatile substance; as, ammonia water. --U. S. Pharm. [1913 Webster]

5. The limpidity and luster of a precious stone, especially a diamond; as, a diamond of the first water, that is, perfectly pure and transparent. Hence, of the first water, that is, of the first excellence. [1913 Webster]

6. A wavy, lustrous pattern or decoration such as is imparted to linen, silk, metals, etc. See {Water}, v. t., 3, {Damask}, v. t., and {Damaskeen}. [1913 Webster]

7. An addition to the shares representing the capital of a stock company so that the aggregate par value of the shares is increased while their value for investment is diminished, or ``diluted.'' [Brokers' Cant] [1913 Webster]

Note: Water is often used adjectively and in the formation of many self-explaining compounds; as, water drainage; water gauge, or water-gauge; waterfowl, water-fowl, or water fowl; water-beaten; water-borne, water-circled, water-girdled, water-rocked, etc. [1913 Webster]

{Hard water}. See under {Hard}.

{Inch of water}, a unit of measure of quantity of water, being the quantity which will flow through an orifice one inch square, or a circular orifice one inch in diameter, in a vertical surface, under a stated constant head; also called {miner's inch}, and {water inch}. The shape of the orifice and the head vary in different localities. In the Western United States, for hydraulic mining, the standard aperture is square and the head from 4 to 9 inches above its center. In Europe, for experimental hydraulics, the orifice is usually round and the head from 1/2 of an inch to 1 inch above its top.

{Mineral water}, waters which are so impregnated with foreign ingredients, such as gaseous, sulphureous, and saline substances, as to give them medicinal properties, or a particular flavor or temperature.

{Soft water}, water not impregnated with lime or mineral salts.

{To hold water}. See under {Hold}, v. t.

{To keep one's head above water}, to keep afloat; fig., to avoid failure or sinking in the struggles of life. [Colloq.]

{To make water}. (a) To pass urine. --Swift. (b) (Naut.) To admit water; to leak.

{Water of crystallization} (Chem.), the water combined with many salts in their crystalline form. This water is loosely, but, nevertheless, chemically, combined, for it is held in fixed and definite amount for each substance containing it. Thus, while pure copper sulphate, {CuSO4}, is a white amorphous substance, blue vitriol, the crystallized form, {CuSO4.5H2O}, contains five molecules of water of crystallization.

{Water on the brain} (Med.), hydrocephalus.

{Water on the chest} (Med.), hydrothorax. [1913 Webster]

Note: Other phrases, in which water occurs as the first element, will be found in alphabetical order in the Vocabulary. [1913 Webster]


The Collaborative International Dictionary of English. 2000.

Look at other dictionaries:

  • Inch of water — Inch Inch, n. [OE. inche, unche, AS. ynce, L. uncia the twelfth part, inch, ounce. See {Ounce} a weight.] [1913 Webster] 1. A measure of length, the twelfth part of a foot, commonly subdivided into halves, quarters, eights, sixteenths, etc., as… …   The Collaborative International Dictionary of English

  • inch of water — A measurement of rainfall. Flowing water: an indefinite term, without meaning in and of itself in the absence of extrinsic evidence indicating the kind of inch or the method of measurement. 56 Am J1st Wat § 4. In some jurisdictions, the amount of …   Ballentine's law dictionary

  • Inch of water — Inches of water, inAq, Aq or inH20 is a non SI unit for pressure. It is used for measuring small pressure differences across an orifice, or in a pipeline or shaft. [ [http://www.npl.co.uk/pressure/faqs/ohnoinches.html Inches of something] ] It is …   Wikipedia

  • inch of water — noun a unit of pressure in the imperial system equal to approx. 249 pascals …   Australian English dictionary

  • inch of water column — (in WC)    a traditional unit of pressure, used in plumbing to describe both water and gas pressures. The conventional equivalent of one inch of water is 249.0889 pascals, which is 2.490 889 millibars, about 0.036 127 pounds per square inch (psi) …   Dictionary of units of measurement

  • inch of water gauge — (in wg or wg)    another common name for the inch of water column. The word gauge (or gage ) after a pressure reading indicates that the pressure stated is actually the difference between the absolute, or total, pressure and the air pressure at… …   Dictionary of units of measurement

  • square inch of water — A stream of water with a cross section area of one square inch measured at right angles with its flow, taking account of the velocity of whatever head is acting upon it …   Ballentine's law dictionary

  • Inch of candle — Inch Inch, n. [OE. inche, unche, AS. ynce, L. uncia the twelfth part, inch, ounce. See {Ounce} a weight.] [1913 Webster] 1. A measure of length, the twelfth part of a foot, commonly subdivided into halves, quarters, eights, sixteenths, etc., as… …   The Collaborative International Dictionary of English

  • inch of mercury — (in Hg)    a traditional unit of atmospheric pressure. In the United States, atmospheric pressure is customarily expressed as the height of a column of mercury exerting the same pressure as the atmosphere. When a traditional mercury barometer is… …   Dictionary of units of measurement

  • Centimetre of water — A centimetre of water (US spelling centimeter of water, abbreviated cmH2O) is a less commonly used unit of pressure derived from pressure head calculations using metrology. It is frequently used to measure the central venous pressure, the… …   Wikipedia

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