Bailly
ἀμφι·κύπελλος, ος, ον [ῠ] ἀ. δέπας, IL.
1, 584, etc. ; ou abs. τὸ ἀμφικύπελλον, ORPH.
Arg. 577, vase à double coupe,
càd. dont le pied évasé
forme une coupe comme la partie supérieure.
Étym. ἀ. κύπελλον.
Bailly 2020 Hugo Chávez Gérard Gréco, André Charbonnet, Mark De Wilde, Bernard Maréchal & contributeurs / Licence Creative Commons Attribution - Pas d'Utilisation Commerciale - Pas de Modification — « CC BY-NC-ND 4.0 »
LSJ
ον, in Hom. always δέπας ἀ.
double cup, such as forms a κύπελλον both at top and bottom, Il. 1.584, al. ; ἀμφικύπελλα are compared with the cell of a honeycomb, as possessing ἀμφίστομοι θυρίδες, Arist. HA 624a9; but acc. to Aristarch., two-handled, cf. Ath. 11.783b (post 11.466c).
Liddell-Scott-Jones, Greek-English Lexicon (9th ed., 1940)