tripersonality

[ trahy-pur-suh-nal-i-tee ]
/ ˌtraɪ pɜr səˈnæl ɪ ti /

noun (sometimes initial capital letter)

the state or condition of being tripersonal; existence in three persons, as the Godhead.

Origin of tripersonality

First recorded in 1665–75; tripersonal + -ity