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The word emeticum could not be parsed. Trying a normal dictionary lookup:
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ēmĕtĭcus, a, um, adj., = ἐμετικός, emetic, turning the stomach: bolbus, App. Herb. 55.
Hence, subst.: † ĕmĕtĭca, ae, f., = ἐμετική, an incitement to vomit, an emetic (employed by the Roman gourmands as the means of renewed gluttony), Cael. ap. Cic. Fam. 8, 1, 4 (cf. bibit et vomit, Juv. 6, 432; dub.; Bait. embaeneticam; al. pineticam, or peneticam).