Noun
The word is derived from hypostasis
of Hypostasis
Source: Webster's dictionaryIn the hypostases of God as correctly expressed against the teachings considered outside the church. Source: Internet
One God as three persons In Trinitarian doctrine, God exists as three persons or hypostases, but is one being, having a single divine nature. Source: Internet
These distinct hypostases are the Father or God in Himself, the Son or Word (Logos), and the Holy Spirit. Source: Internet