Definition of cumec in English:

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cumec

Pronunciation: /ˈkjuːmɛk/

noun

A cubic metre per second, as a unit of rate of flow of water.
Example sentences
  • I do not believe, and I do not think anyone on the select committee believed, that 15 cumecs of water would cause it to lose its ability to generate electricity for the rest of New Zealand.
  • We are talking about a river that has a mean annual flow of about 340 cumecs.
  • We should be concerned for the safety of the elderly and invalids in the event that this new river is ever operated at its stated capacity of 215 cumecs.

Origin

1950s: from cubic metres per second.

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