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 among mechanics. It was also formerly divided into twelve parts, called lines, and originally into three parts, called barleycorns, its length supposed to have been determined from three grains of barley placed end to end lengthwise. It is also sometimes called a prime ('), composed of twelve seconds (''), as in the duodecimal system of arithmetic. [1913 Webster]

12 seconds ('') make 1 inch or prime. 12 inches or primes (') make 1 foot. --B. Greenleaf. [1913 Webster]

Note: The meter, the accepted scientific standard of length, equals 39.37 inches; the inch is equal to 2.54 centimeters. See {Metric system}, and {Meter}. [1913 Webster]

2. A small distance or degree, whether of time or space; hence, a critical moment; also used metaphorically of minor concessins in bargaining; as, he won't give an inch; give him an inch and he'll take a mile. [1913 Webster]

Beldame, I think we watched you at an inch. --Shak. [1913 Webster]

{By inches}, by slow degrees, gradually.

{Inch of candle}. See under {Candle}.

{Inches of pressure}, usually, the pressure indicated by so many inches of a mercury column, as on a steam gauge.

{Inch of water}. See under {Water}.

{Miner's inch}, (Hydraulic Mining), a unit for the measurement of water. See {Inch of water}, under {Water}. [1913 Webster]


The Collaborative International Dictionary of English. 2000.

Look at other dictionaries:

  • 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… …   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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