Meaning of the Sanskrit Word: manvantarani

  manvantarani—the reign of the Manus    SB 2.10.4
  manvantarani—different advents of Manus    SB 3.10.30
  manvantarani—periods of Manu    SB 8.14.11
  manvantarani—all about the periods of the various Manus    SB 9.1.1

Can't find any compound Sanskrit words containing manvantarani.