τρίπεδος
From LSJ
πολλὰ μεταξὺ πέλει κύλικος καὶ χείλεος ἄκρου → there is many a slip twixt cup and lip, there's many a slip twixt cup and lip, there's many a slip 'twixt cup and lip, there's many a slip twixt the cup and the lip, there's many a slip 'twixt the cup and the lip
English (LSJ)
ον, (πούς)
A three feet long, διάμετρος Plb.6.22.2; θριγκοί IG7.3073.76 (Lebad., ii B. C.).