M004304m084293
Từ Điển Thuật Ngữ Phật Học Hán Ngữ
bhūrom, an exclamation frequently occurring at the beginning of mantras, probably in imitation of Brahmanic mantras, which begin by invoking bhūr earth, bhuvaḥ air, and svar heaven; or it may be a combination of bhūr earth, and oṃ, the mystic interjection.