Meaning of the Sanskrit Word: rasatalam

  rasātalam—the planets named Rasātala    SB 2.1.26
  rasātalam—the sixth planetary system below    SB 2.5.40-41
  rasātalam—to the depths of the ocean    SB 3.18.1
  rasātalam—Rasātala    SB 5.24.7
  rasātalam—to the lower region of the universe    SB 9.7.2
  rasātalam—to Pātāla, the lower part of the universe.    SB 9.9.4

Can't find any compound Sanskrit words containing rasatalam.