Meaning of the Sanskrit Word: vibhavasuh

  vibhāvasuḥ—Vibhāvasu    SB 6.6.10-11, SB 6.6.29-31
  vibhāvasuḥ—the fire-god    SB 8.10.32-34, SB 8.18.22
  vibhāvasuḥ—fire    SB 7.3.23
  vibhāvasuḥ—a fire    SB 9.14.46

Can't find any compound Sanskrit words containing vibhavasuh.