Meaning of the Sanskrit Word: udanvatah

  udanvatah—from the Garbhodaka Ocean    SB 5.18.39
  udanvatah—of the ocean of milk    SB 8.10.5
  udanvatah—of the sea    SB 4.30.44
  udanvatah—devastation    SB 1.6.29

Can't find any compound Sanskrit words containing udanvatah.