Rhet gre 1356b16-18τὸ δὲ τινῶν ὄντων ἕτερόν τι διὰ ταῦτα συμβαίνειν (17) παρὰ ταῦτα τῷ ταῦτα εἶναι ἢ καθόλου ἢ ὡς ἐπὶ τὸ πολὺ (18) ἐκεῖ μὲν συλλογισμὸς ἐνταῦθα δὲ ἐνθύμημα καλεῖται.
Rhys Roberts 1924 engwhen it is shown that, certain propositions being true, a further and quite distinct proposition must also be true in consequence, whether invariably or usually, this is called syllogism in dialectic, enthymeme in rhetoric.
http://www2.hf.uio.no/common/apps/permlink/permlink.php?app=polyglotta&context=record&uid=c81232bb-1d51-11e7-ba66-0050569f23b2