O / Orgĭa
noun

Orgĭa

gen. ōrum · gender neuter · decl. 2nd
a nocturnal festival in honor of Bacchus; accompanied by wild bacchanalian cries; the feast
a nocturnal festival in honor of Bacchus, accompanied by wild bacchanalian cries, the feast or orgies of Bacchus.
Lit., Verg. A. 4, 303; Ov. M. 11, 93; Verg. G. 4, 521.—
secret frantic revels; orgies by extension
Transf., in gen., secret frantic revels, orgies, Juv. 2, 91; Stat. S. 5, 5, 4.—
figuratively
Trop.: Itala per Graios Orgia ferre choros, the mysteries of love in the Latin tongue, Prop. 4, 1, 4: naturae, secrets, mysteries, Col. 10, 217.