initiatio
Could not find initiationibus in Logeion dictionaries.
initiationibus Noun: feminine ablative plural, Noun: feminine dative plural of initiatio
ĭnĭtĭātĭo, ōnis, f. [inito],
- a participation in secret religious rites: Eleusiniorum sacrorum, Suet. Ner. 34.
initiātio, ōnis, f. (initio), die feierliche Begehung eines Geheimgottesdienstes, Suet. Ner. 34, 4 u. Eccl.
ante ~onem parliamenti predicti
ad istorum ‥ duorum collegiorum ~onem et fundamen
ĭnĭtĭātĭō, (16) ōnis, f. (initio), initiation : Suet. Nero 34.