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
8490
Mac OS
A popular operating system for Macintosh computers manufactured by Apple Computer Corp.
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451
Mach number
img:equations//446_451_e.jpg
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8491
Machine language
A language for writing instructions in a form to be executed by the machine; the language can be directly interpreted by the control section of the machine......
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8492
Macro
A combination of commands, instructions, or keystrokes which may be stored in a computer’s memory to be executed as a single command by a single keystroke or a simultaneous combination of keystrokes......
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8493
Macroassembler
An assembly language translator that converts macro expressions into several machine language instructions. Although macros simplify program coding and speed up execution of a program, a code for each macro must also be generated......
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6586
Macroclimate
The climate representative of relatively large areas.
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696
Macroclimate
The climate over a very large areas, such as deserts or oceans.
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6901
Macronutrient
An element or compound needed in relatively large quantities by an organism.
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6846
Macroorganisms
Organisms visible with the unaided eye.
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7053
Macrophyte
Large forms of vegetation.
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1661
Macrostructure
Soil structure presenting the aggregates of the mineralogical complexes into larger units, as a result of cementation.
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8209
Magnetic tape
Narrow length of thin plastic, coated with a magnetic material used to store signals magnetically.
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2521
Main body
The structural part of the dam above foundations.
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4640
Main canal, Main line, Pipe main, or Principal canal
A canal receiving its supplies from the headworks and in turn supplying water to the laterals, branch canals or distributaries. .....
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4762
Main control panel
Enclosure containing the main control as well as the other controls used for starting and stopping an irrigation machine......
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7781
Main drain
See 5323 and 7780.
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5323
Main drain, or Conducting drain
Principal drain that conveys drainage water from the collector drains, branch drains or submain drains to an outlet.
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5058
Main drainage system
System that conveys drainage water from the field drainage system to an outlet. It may consist of a main drain, submain drains, branch drains and collector drains......
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4760
Main electric cable
Cable connecting the electric point to the motor of the irrigation machine.
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8375
Main frame
Large-scale high powered computer system that can handle a number of operators simultaneously.
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8017
Main levee
Levee protecting areas of great economic value (industry, agriculture, etc.). These are required to offer protection for the required degree of safety against all floods passing down the river or stream (illustrated)......
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4772
Main line
Pipeline of an irrigation system under pressure going from the water source to the sub-mains or to the distribution nozzle-lines......
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8210
Main memory
Usually the fastest storage device of a computer and the one from which instructions are executed.
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2736
Main spillway
The spillway designed to pass the design flood which usually comes into operation. The main spillway can be assisted by an emergency spillway in passing the design flood......
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5324
Maintenance
The operations performed in preserving irrigation or drainage canals and drain pipes, hydraulic structures, service roads and works in good or near original conditions. Repairs are part of maintenance......
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