Nature Body [of a Buddha]
essence kaya; Skt. svabhavikakaya. The 'essence body,' sometimes counted as the fourth kaya, and constituting the unity of the three kayas. Jamgön Kongtrül defines it as the aspect of dharmakaya which is 'the nature of all phenomena, emptiness devoid of all constructs and endowed with the characteristic of natural purity.'
Essence kaya; Skt. svabhavikakaya. The 'essence body.' Sometimes counted as the fourth kaya, the unity of the three kayas
svabhavikakaya; essence body, svabhava-kaya, quintessential body, body of essentiality; essential nature of being itself