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theoretician (plural theoreticians)

  1. someone who is expert in the theory of a particular science or art
  2. a theorist
    • 2013 December 10, Ron Cowen, “Simulations back up theory that Universe is a hologram”, in Nature News[1], retrieved 2014-04-27:
      “They have numerically confirmed, perhaps for the first time, something we were fairly sure had to be true, but was still a conjecture — namely that the thermodynamics of certain black holes can be reproduced from a lower-dimensional universe,” says Leonard Susskind, a theoretical physicist at Stanford University in California who was among the first theoreticians to explore the idea of holographic universes.