Supposedly from Ancient Greek, but perhaps invented later. See remarks at Wikipedia.
Bucentaur Sentence Examples
cf France passed through Venice on his return from Poland in 1574, Zarlino directed on board the "Bucentaur" the performance of an ode for which he himself had composed the music, to verses supplied by Rocco Benedetti and Cornelio Frangipani.
Mus.) The name bucentaur seems, indeed, to have been given to any great and sumptuous Venetian galley.
The form it took was a solemn procession of boats, headed by the doge's maesta nave, afterwards the Bucentaur (from 1311) out to sea by the Lido port.