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Theoretician

noun

Noun

1
Someone who is expert in the theory of a particular science or art.
2
someone who theorizes (especially in science or art) wordnet
3
A theorist.
"“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."

From theoretic + -ician.

Unscramble this word: theoretician