κηΰα keÿa, n.: burnt offering, perhaps (following Hesychius) also purificatory.
Hapax legomenon occurring only once on an inscription containing the law of Delphic amphictyons from 380/379 BC. (IG II2 1126 ➚ in. 34 = Ziehen 1906: 226-234 no. 75, v. 34 with commentary on p. 233). Derived from the verb καίω (see Chantraine 1968: 481 and 528, respectively s.v.: καίω and κήυα).
On the aforementioned inscription it evidently occurs as the name of a sacrifice of three animals (τρίττοια, here in the form τρίκτευα).
According to LSJ (s.v.) and the commentaries on the edition of the inscriptions following the lexicon of Hesychius (s.v. κήϊα, κέϊα) it means a purificatory sacrifice, equivalent to καθάρματα, which is by no means indicated by the context in which it appears.