Meaning of the Sanskrit Word: adhvaryuna

  adhvaryuṇā—by the priest, Bhṛgu    SB 4.4.33
  adhvaryuṇā—with the Yajur Veda    SB 4.7.18
  adhvaryuṇā—by the ṛtvik priest    SB 9.1.15

Can't find any compound Sanskrit words containing adhvaryuna.