ἴγδισμα
From LSJ
Ἀδώνι' ἄγομεν καὶ τὸν Ἄδωνιν κλᾴομεν → We conduct the rites of Adonis, we weep for Adonis (Pherecrates, fr. 170)
English (LSJ)
ατος, τό, (from ἰγδίζω, which is not found)
A pounding: hence, a dance, in which the loins were moved like a pestle, EM464.51, Suid.
German (Pape)
[Seite 1235] τό, das Stoßen im Mörser. Nach E. M. ein von seinem Stampfen benannter Tanz.