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

Multilingual Technical Dictionary (MTD)
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Term No.Term NameTerm Description
6375Maintenance cardsA record of each intervention by the maintenance personnel on a single, written sheet (card)......
9068Maintenance period, or Guarantee periodThe period after the completion of the construction of a work during which the contractor is responsible for making good the repairs or damage that ma.....
6370Maintenance provisionFunds provided to cover corrective maintenance costs and renewal of used or removal of obsolete items......
7185Major air pollutantsThe primary air pollutants for which ambient air quality standards have been promulgated,  including carbon monoxide, hydrocarbons, nitrogen oxides, o.....
8985Major estimateA term applied to the estimate of a works, when sanctioned amount of the work expenditure exceeds a specified amount. This term is also applied, for t.....
5700MalleabilityThe property that determines the capacity to deform when cold in all directions......
5673Malleable cast iron, or Malleable ironCast iron that is cast white and made malleable by annealing in an oxidizing or neutral medium......
1706Mallee soil, Solonized brown soil, MallisolBrown highly calcareous soil of the semiarid regions of south-eastern Australia. The subsoil containing more clay and calcium carbonate than the surfa.....
6996MammalophagousConsumer of mammals as a dietary source......
6353Management account of farm unitAn exact account of farm unit expenses and income. Includes the cost of purchases and cost of services. The income includes the proceeds from direct o.....
8637Management modelA model that aids in transmitting clear information about the state of the system to decision-makers, disseminating their decisions properly, and so o.....
8638Management spaceSpace for purposes of management, boundaries that are determined by various conditions, such as the size of the country, the degree of uniformity of r.....
5129ManholeA structure installed along main or collector drains for maintenance and inspection of the pipe. Could be above or buried below ground surface......
3080Manning`s equation1- A formula giving relationship between velocity of flow V (m/sec in SI or ft/sec in FPS), hydraulic radius R (m or ft), and friction slope S (m/m or.....
8686ManometerAn instrument for measuring the pressure of fluids; a pressure gauge or vacuum gauge. The pressure of the fluid is balanced against a column of a stan.....
5426Manual controlSystem by which pumping unit is started and stopped manually......
5474MarbleA general term of any limestone that will take a good polish. Strictly, a metamorphized and recrystallized limestone. Named according to the place and.....
6530Marginal bund1 - In soil conservation, an embankment which is constructed at the lowest part of the catchment without any reference to contour. 2 - See 1525......
1525Marginal bund1 - A backwater bund; a term used in India and Europe for an embankment built along a river, upstream of a weir at a short distance from the margin. (.....
205Marginal distributionIn a distribution with two variates, the distribution of one of the variates, the other being ignored. It may be obtained by adding for each value or .....
206Marginal expectationIn the case of a probability distribution with k variates, a marginal distribution of a subset of p variates exists, the other (k - p) variates taking.....
1294MarinePertaining to the ocean, sea or other bodies of salt water......
6055Marker systemA system with signal lights set on the rim of the dial scales of the batchers to mark the desired amount of each material for each class of concrete......
7685Marl 1 ‑A deposit formed at the bottoms of water bodies; contains much calcium carbonate; grayish or off‑white; may be soft or in hard concretions. 2 â.....
2172Marl1 - An earthy crumbling deposit consisting chiefly of calcium carbonate mixed with clay or other impurities in varying proportions. It is used frequen.....
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The Multilingual Technical Dictionary (MTD) is an e-dictionary of all technical terms related to irrigation, drainage, flood management, environment, river training, and allied disciplines of the water sector. Any term/ definition can be printed/copied with the option to download/updates of terms from the ICID website. The MTD enriches the process of sharing and exchange of experiences and has proven to be highly useful for engineers, researchers, students, professionals, planners, designers, academics and all others related to the field of irrigation and drainage.  It is more helpful for professionals outside the water sector, in simplifying the technical jargon and to understand the sectoral nuances easily. 

As part of ICID's flagship activity, it was first published in English and French languages in 1967, the – 4th  edition of the MTD (English-French) was brought out on CD-ROM in the year 2002. Currently, we are following the 5th  edition released in 2009, which defines 9,370 technical terms in Chinese, Japanese and Russian, besides English and French. This online version of MTD is based on the 5th edition's DVD format. This version includes 9370 technical terms with matching English and French translation. The DVD version also includes terms collected in Chinese, Japanese and Russian languages with the active support received from respective National Committees. However, full integration with online versions has not taken place due to the difference in available translation editions/ versions. National Committees of Iran, China, Japan, Russia, Korea, and India are working on the translation/  updating part to match the present online version.