International Commission on Irrigation & Drainage Commission Interationale des Irrigation et du Drainage

Multilingual Technical Dictionary (MTD)
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Term No.Term Name/Term DescriptionAction
66
Cumulative absolute (relative) frequency polygon
The polygonal line obtained by joining the points the abscissa of which is the upper limit on each class and the ordinate is either the cumulative absolute or relative frequency......
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337
Foot-Pound-Second (FPS) system, or British system
A system of units having the foot as the unit of length, the pound as the unit of weight or mass, and the second as the unit of time......
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338
Centimetre-Gram-Second (CGS) system
A system of units based upon the centimetre as the unit of length, the gram as the unit of weight or mass and the second as the unit of time. In practice this system was enlarged by adding the kelvin, the candela and the mole as base units for the base quantities, temperature, luminous intensity and amount of substance respectively......
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339
Metre-Kilogram-Second (MKS) system
A system of units having the metre as a unit of length, the kilogram as the unit of weight or mass and the second as the unit of time......
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341
Parts per million (PPM)
The concentration of a substance (generally a solute or sediment) expressed as its mass divided by the mass of the solution or suspension......
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343
Metre (m)
The metre is the length of path travelled by light in vacuum during a time interval of 1/299 792 458 of a second.
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344
Kilogram (kg)
The kilogram is a unit of weight (mass); equal to the mass of the international prototype of the kilogram.
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345
Second (s)
The second is the duration of 9 192 631 770 periods of radiation corresponding to the transition between the two hyperfine levels of the ground state of the caesium (-)133 atom......
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346
Ampere (A)
The ampere is that constant current that, if maintained in two straight parallel conductors of infinite length, of negligible circular cross section, and placed one metre apart in vacuum, would produce between these conductors a force equal to 2 x 10-7 newton per metre of length......
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347
Kelvin (K)
The kelvin, unit of thermodynamic temperature, is the fraction 1/273.16 of the thermodynamic temperature of the triple point of water......
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348
Mole (mol)
The mole is amount of substance of a system which contains as many elementary entities as there are atoms in 0.012 kilograms of Carbon-12. When the mole is used, the elementary entities must be specified and may be atoms, molecules, ions, electrons, other particles, or specified groups of such particles......
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349
Candela (cd)
The candela is the luminous intensity, in a given direction, of a source that emits monochromatic radiation of frequency 540 x 1012 hertz and that has a radiant intensity in that direction of 1/683 watt per steradian......
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352
Force (N)
The force that is when applied to a body having a mass of one kilogram, gives it an acceleration of one metre per second squared. Unit of force is newton......
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353
Energy (J)
It is the work done when the point of application of force of one newton is displaced through a distance of one metre in the direction of the force. Unit of energy is joule......
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354
Power (W)
It is one joule per second. Unit of power is watt.
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355
Electric charge (C)
It is the quantity of electricity transported in one second by a current of one ampere. Unit of electric charge is coulomb......
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356
Electric potential (V)
It is the difference of potential between two points of a conducting wire carrying a constant current of one ampere, when the power dissipated between these points is equal to one watt. Unit of electric potential is volt......
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357
Electric capacitance (F)
It is the capacitance of a capacitor between the plates of when there appears a difference of potential of one volt when it is charged by electricity equal to one coulomb. Unit of electric capacitance is farad......
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358
Electric resistance (W )
It is the resistance between two points of a conductor when a constant difference of potential of one volt, applied between these two points, produces a current of one ampere in this conductor, this conductor not being the source of any electromotive force. Unit of electric resistance is ohm......
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359
Electric inductance (H)
It is the inductance of a closed circuit when an electromotive force of one volt is produced and the electric current in the circuit varies uniformly at the rate of one ampere per second. Unit of electric inductance is henry......
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360
Luminous flux (lm)
It is the flux emitted within unit solid angle of one steradian by a point source having a uniform intensity of one candela. Unit of luminous flux is lumen......
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361
Illumination (lx)
An illumination of one lumen per square metre. Unit of illumination is lux.
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411
Angle (plane angle)
img:equations//411_412_e.jpg
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432
Viscosity, (Dynamic viscosity)
img:equations//430_433_e.jpg
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452
10 millimetres (mm)
img:equations//452_458_e.jpg
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