Dirac
di·rac
noun
English theoretical physicist who applied relativity theory to quantum mechanics and predicted the existence of antimatter and the positron (1902-1984)
Origin
From the French surname Dirac, probably from the French town by that name in Charente, from Medieval Latin Adiraco, Dyracum, from a Gallo-Roman name, Latin Atirius (a derivative of Atilius), or alternatively a Frankish/Germanic name *Adarus, in either case with the common Gallo-Roman nominal suffix -acum.
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