opinatio
From LSJ
πωγωνοτροφία φιλόσοφoν οὐ ποιεῖ → a long beard does not make the philosopher
Latin > English (Lewis & Short)
ŏpīnātĭo: ōnis, f. id.,
I a supposing, opining; a supposition, conjecture, imagination, fancy, opinion, belief (class.): opinationem volunt esse imbecillam assensionem, Cic. Tusc. 4, 7, 15; id. Ac. 2, 25, 78: haec autem opinatio est judicatio se scire, quod nesciat, id. Tusc. 4, 11, 26; cf. the context: mordax et inepta, Val. Max. 1, 8, 8: (Tullius) quid super tali opinatione sentiret, Arn. 3, 6.
Latin > French (Gaffiot 2016)
ŏpīnātĭō, ōnis, f. (opinor), acte de se former telle ou telle opinion [t. philos.], conception, opinion, idée : Cic. Tusc. 4, 15 ; 4, 26 ; Ac. 2, 78.