Inches of pressure
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:

• Pressure head — is a term used in fluid mechanics to represent the internal energy of a fluid due to the pressure exerted on its container. It may also be called static pressure head or simply static head (but not static head pressure). It is mathematically… …   Wikipedia

• Pressure measurement — The construction of a bourdon tube gauge, construction elements are made of brass Many techniques have been developed for the measurement of pressure and vacuum. Instruments used to measure pressure are called pressure gauges or vacuum gauges. A… …   Wikipedia

• Pressure altitude — In aviation, pressure altitude is the indicated altitude when an altimeter is set to an agreed baseline pressure setting. This setting 101,325 Pa, equivalent to 1013.25 millibar (or hectopascals), or 29.92 inches Hg is equivalent to the air… …   Wikipedia

• pressure — pressureless, adj. /presh euhr/, n., v., pressured, pressuring. n. 1. the exertion of force upon a surface by an object, fluid, etc., in contact with it: the pressure of earth against a wall. 2. Physics. force per unit area. Symbol: P Cf. stress… …   Universalium

• Pressure system — A pressure system is a region of the Earth s atmosphere where air pressure is unusually high or low. High and low pressures develop (and dissipate) constantly due to thermodynamic interactions of temperature differentials in the atmosphere and… …   Wikipedia

• Pressure regulator — A pressure regulator is a valve that automatically cuts off the flow of a liquid or gas at a certain pressure. Regulators are used to allow high pressure fluid supply lines or tanks to be reduced to safe and/or usable pressures for various… …   Wikipedia

• pressure, head — Force caused by the weight of a column or body of fluids. Expressed in feet, inches, or psi …   Dictionary of automotive terms

• By inches — 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 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