ūraeus

a, um, adj.
I. of or belonging to the tail: cybia, Plin. 32, 11, 53, § 151 (dub.; Jahn, terna cybia); cf. uraeon = οὐραῖον, fishtail, Varr. L. L. 5, § 77 Müll.
Lewis & Short
A Latin Dictionary, 1879
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