either of two ancient Celtic tribes, or perhaps two divisions of the same people, one living in Gaul, the other in Italy. The Gallic Senones lived in the area that includes the modern French departements of Seine-et-Marne, Loiret, and Yonne. They fought against Julius Caesar in 53-51 BC; in later times these Senones were included in Gallia Lugdunensis. Their chief town was Agendicum (later Senonus, whence Sens).
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