βαυκάλιον

τό
A. narrow-necked vessel, that gurgles when water is poured in or out, POxy. 936.6 (iii A. D.), Olymp. in Mete. 93.6: pl., Alex.Aphr. Pr. 1.94 (καυκ‐ codd.).
Liddell, Scott & Jones
A Greek-English Lexicon, 1940
An open-access project