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English definition of “scalar”

scalar

noun [C]     /ˈskeɪ.lər/ US  /-lɚ/ specialized
something that has size but no direction, such as a quantity, distance, speed, or temperature → Compare vectorMeasurements of length and distance scalar     adjective a scalar quantityDescribing size and quantity
(Definition of scalar noun from the Cambridge Advanced Learner's Dictionary & Thesaurus © Cambridge University Press)
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