Kathenotheism is a term coined by the philologist Max Müller to mean the worship of one god at a time.
Müller coined the term in reference to the Vedas, where he explained each deity is treated as supreme in turn.
Kathenotheism, a more specific form of henotheism, refers to the worship of a succession of supreme gods "one at a time", from the Greek kath' hena "one by one" + theism.
[1] The ancient Orphic religion had a polytheistic theology.
The Smarta Tradition of Hinduism worship the five major deities as supreme in turn and collectively.