Borrowed from Latin poculum. Doublet of bucchero.

• IPA^(key): /ˈpɒkjʊləm/

poculum (plural pocula)

1. (historical) A drinking-cup used in Ancient Rome.
   • 1989, Anthony Burgess, The Devil's Mode:

     They sat together over elaborate glass pocula blown in Cologne; the wine too was Rhenish.

• poculiform

• (ante-Classical) poclum
• pocolom (Old Latin)

From Proto-Italic *pōtlom, from Proto-Indo-European *péh₃tlom, derived from the root *peh₃- (“to drink”) (whence also bibō).

Cognate with Old Irish ól, and Sanskrit पात्र (pātra).

• (Classical Latin) IPA^(key): [ˈpoː.kʊ.ɫũː]
• (modern Italianate Ecclesiastical) IPA^(key): [ˈpɔː.ku.lum]

pōculum n (genitive pōculī); second declension

1. a drinking cup

   Vīsne pōculum merī?

   Would you like a cup of strong wine?

2. as used in context to describe the experience of social drinking: having a drink, etc.
   • 106 BCE – 43 BCE, Cicero, Cato Maior de Senectute 14.46:

     Mē vērō et magisteria dēlectant ā maiōribus īnstitūta, et is sermō, quī mōre maiōrum ā summō adhibētur in pōculō; et pōcula, sīcut in Symposiō Xenophontis est, minūta atque rōrantia […].

     As for me, I truly delight in both the presiding roles [at banquets], as established by our ancestors, and in that style of conversation which, by ancient custom, is led from the head of the couch during the wine; and [I enjoy] the cups — just as [they are described] in Xenophon’s Symposium — small in size and filled by driblets.
     (The first poculo is a metonymy in which the cup itself represents the social event or experience: “over a cup,” “while having a cup,” “at the party,” “during the wine,” “while the wine is flowing.” The second instance refers to Xenophon’s Symposium, 2.26, which suggests an optimal amount of alcohol to serve party guests.)

Second-declension noun (neuter).

• pōculentus

• → English: poculum
• Galician: púcaro
• Italian: poculo
• Portuguese: púcaro
  • → Spanish: búcaro
    • → Italian: bucchero, buccaro (archaic)
      • → English: bucchero
• Spanish: póculo

• “poculum”, in Charlton T. Lewis and Charles Short (1879), A Latin Dictionary, Oxford: Clarendon Press
• “poculum”, in Charlton T. Lewis (1891), An Elementary Latin Dictionary, New York: Harper & Brothers
• "poculum", in Charles du Fresne du Cange, Glossarium Mediæ et Infimæ Latinitatis (augmented edition with additions by D. P. Carpenterius, Adelungius and others, edited by Léopold Favre, 1883–1887)
• “poculum”, in Gaffiot, Félix (1934), Dictionnaire illustré latin-français, Hachette.
• Carl Meißner; Henry William Auden (1894), Latin Phrase-Book‎^[1], London: Macmillan and Co.
  • to drain the cup of poison: poculum mortis (mortiferum) exhaurire (Cluent. 11. 31)
    
  • I drink your health: propīno tibi hoc (poculum, salutem)
    
  • whilst drinking; at table: inter pocula
    
  • to empty a cup at a draught: exhaurire poculum
    
• “poculum”, in Harry Thurston Peck, editor (1898), Harper’s Dictionary of Classical Antiquities, New York: Harper & Brothers
• “poculum”, in William Smith et al., editor (1890), A Dictionary of Greek and Roman Antiquities, London: William Wayte. G. E. Marindin
• De Vaan, Michiel (2008), Etymological Dictionary of Latin and the other Italic Languages (Leiden Indo-European Etymological Dictionary Series; 7), Leiden, Boston: Brill, →ISBN