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(physics) the quotient of the sum of the initial kinetic energies of all the charged particles liberated by indirectly ionizing radiation in a volume element of a material divided by the mass of the volume element. The SI unit is the gray
Word Origin
C20: k(inetic) e(nergy) r(eleased per unit) ma(ss)
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition
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Examples from the Web for kerma
Historical Examples
  • From Kareima downstream the Nile is navigable to kerma, just above the 3rd cataract.

  • El Kheir was defeated, and fixed his advanced camp at kerma.

  • But no sooner were the village and fort of kerma visible than the report passed along the ranks that they were deserted.

    The River War Winston S. Churchill
  • Although the river from Kosheh to kerma is broken by continual rapids, it is, with one interval, freely navigable at half Nile.

    The River War Winston S. Churchill
  • It was resolved to attack the Dervish position at kerma at dawn.

    The River War Winston S. Churchill
  • And, finally, the section from Kosheh to kerma must be completed before the Nile flood subsided.

    The River War Winston S. Churchill
  • To this end the railway was continued another hundred miles, from Kosha to kerma, which point was reached in May, 1897.

  • The river railway had now been carried from Wady Halfa to kerma, above the third cataract.

  • From Kosheh to kerma, the first Dervish position, the distance by river is 127 miles.

    The River War Winston S. Churchill
  • The extension of the line from Kosheh to kerma was therefore of vital importance.

    The River War Winston S. Churchill

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