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   quantum

   /ˈkwɒntəm/

   noun

   • 1. a discrete quantity of energy proportional in magnitude to the frequency of the radiation it represents.
   • ▪ an analogous discrete amount of any other physical quantity, such as momentum or electric charge.
   • ▪ the unit quantity of acetylcholine released at a neuromuscular junction by a single synaptic vesicle, contributing a discrete small voltage to the measured end-plate potential.
   • 2. a required or allowed amount, especially an amount of money legally payable in damages: "the court must determine the quantum of compensation due"
   • ▪ a share or portion: "each man has only a quantum of compassion"

   Word Origin mid 16th century (in the general sense ‘quantity’): from Latin, neuter of quantus (see quantity). Sense 1 dates from the early 20th century.

   Scrabble Points: 18

   • Q

     10

   • U

     1

   • A

     1

   • N

     1

   • T

     1

   • U

     1

   • M

     3

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