Meaning of IPSE DIXIT in English

ˌipsēˈdiksə̇t noun

( plural ipse dixits )

Etymology: Latin, literally, he himself said it, translation of Greek (Doric) autos epha; from the use of this expression by the Pythagoreans in reference to statements made by Pythagoras himself

: an assertion made on authority but not proved : dictum

has had a good many followers ready to accept his ipse dixit — D.W.Hering

Webster's New International English Dictionary.      Новый международный словарь английского языка Webster.