
1) Ship of the Venetian navy
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https://www.crosswordclues.com/clue/bucentaur

The bucentaur (ɔr {respell|bew|SEN|tor}; bucintoro in Venetian) was the state barge of the doges of Venice. It was used every year on Ascension Day up to 1798 to take the doge out to the Adriatic Sea to perform the `Marriage of the Sea` – a ceremony that symbolically wedded Venice to the sea every year on the `Festa della Sensa` (Ascension ...
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http://en.wikipedia.org/wiki/Bucentaur

legendary half-man and half-ox
Found on
http://phrontistery.info/b.html

• (n.) A fabulous monster, half ox, half man. • (n.) The state barge of Venice, used by the doge in the ceremony of espousing the Adriatic.
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http://thinkexist.com/dictionary/meaning/bucentaur/

in the Republic of Venice, a highly decorated galley used by the doge on solemn state occasions, especially at the annual ceremony of the `wedding of ...
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http://www.britannica.com/eb/a-z/b/123

Ship, richly decorated with figures of monsters, in which the doge of Venice sailed every year on Ascension Day to the Adriatic Sea. He then performed the rite of dropping a ring into the water, to...
Found on
http://www.encyclo.co.uk/local/20688
Bu·cen'taur noun [ Greek
boy^s ox +
ke`ntayros centaur.]
1. A fabulous monster, half ox, half man.
2. [ Italian
bucentoro .] The state barge of Venice, used by the doge in the ceremony of espousing the Adriatic.
Found on
http://www.encyclo.co.uk/webster/B/107

In Greek mythology, the Bucentaur was a mythical creature, half man and half ox.
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http://www.probertencyclopaedia.com/browse/D1B.HTM
No exact match found.