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ip·se dix·it(ĭp′sē dĭk′sĭt)
An unsupported assertion, usually by a person of standing; a dictum.
[From Latin ipse dīxit, he himself said (it) : ipse, he himself + dīxit, third person sing. perfect tense of dīcere, to say.]
ipse dixit(ˈɪpseɪ ˈdɪksɪt)
(Literary & Literary Critical Terms) an arbitrary and unsupported assertion
[C16, literally: he himself said it]
ip•se dix•it(ˈɪp si ˈdɪk sɪt)
an assertion without proof.
[1565–75; < Latin: he himself said it, translation of Greek autòs épha a phrase attributed to the Pythagoreans, in citing Pythagoras' authority]
A Latin phrase meaning he himself said it, used to mean an unsupported assertion.