cultus
Established or accepted religious rites or customs of worship; state of religious development.
Among the rituals which members of their family had inaugurated in other states of Greece, was a peculiar cultus of Hermes (Mercury) at Stymphalus in Arcadia.
Where it comes from
From Latin cultus (“cultivation, culture”). See cult.
Adapted from the Wiktionary entry cultus (CC BY-SA 4.0).