Definition of theorician in English:

theorician

noun

rare, archaic
  • A person who holds or advances a theory or theories; an expert in the theoretical aspects of a subject.

Origin

Mid 17th century; earliest use found in Alexander Read (1586?–1641). From either theoric or theoric + -ian, after logician, physician, etc.; compare -ician.

Pronunciation

theorician

/ˌθɪəˈrɪʃn/