The name comes ultimately from Italian bucentoro, and may be taken from the figurehead of the vessel, representing a mythical creature, half man and half ox, perhaps from Greek bous ‘ox’ + kentauros ‘centaur’. Alternatively, bucentoro may be from Venetian Italian, literally ‘barge of gold’.
"Bucentaur." The Oxford Dictionary of Phrase and Fable. . Encyclopedia.com. (May 20, 2018). http://www.encyclopedia.com/humanities/dictionaries-thesauruses-pictures-and-press-releases/bucentaur
"Bucentaur." The Oxford Dictionary of Phrase and Fable. . Retrieved May 20, 2018 from Encyclopedia.com: http://www.encyclopedia.com/humanities/dictionaries-thesauruses-pictures-and-press-releases/bucentaur