Lewis & Short

trĭpŏdātĭo, ōnis, f. [‡ tripodo], a solemn, measured stamping with the feet of the Arval brothers, Inscr. Frat. Arv. Orell. 2271; cf. trĭpŭdĭātĭo, χορεία ἱερέως περὶ τὸν βωμόν, Gloss. Philox.