Parsing inflected forms may not always work as expected. If the following does not give the correct word, try Latin Words or Perseus.
cōpa (cūpa), ae, f. [copo = caupo], a female tavern-keeper and castanet-dancer, who exhibited her arts in her ale-house (cf. crotalum), Verg. Cop. 1 Heyne and Wagner: matronae copas imitantes, Suet. Ner. 27.
1. cūpa, ae, f. [cf. κύπτω], a tub, cask, tun, vat, etc., for holding liquids, esp. wine, Varr. ap. Non. p. 83, 24 sq.; Pall. 1, 18, 2; 1, 38, 1; Cic. Pis. 27, 67 (but acc. to Ernesti, a female vintner; cf. copa); Caes. B. C: 2, 11; Luc. 4, 420; also for grain, Dig. 19, 2, 31; and for the ashes of the dead, a niche, Inscr. Orell. 2697; 4550.
† 2. cūpa, ae, f., = κώπη (v. Lidd. and Scott in h. v.), the handle of an oil-mill, a crooked handle, Cato, R. R. 12, 21.