Ŏpālĭa

ium, n.
I. a festival celebrated on the 19th of December, in honor of the goddess Ops, Varr. L. L. 6, § 22 Müll.; cf.: Opalia dies festi, quibus supplicatur Opi, Paul. ex Fest. p. 185 Müll.; Macr. S. 1, 10.
Lewis & Short
A Latin Dictionary, 1879
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