Meaning of the Sanskrit Word: sisun

  sisun—children    SB 1.7.51, SB 7.1.37, SB 10.6.5-7
  sisun—all such children.    SB 10.4.31
  sisun—small babies    SB 10.6.2
  sisun—small children    SB 1.13.34
  sisun—so many children.    SB 10.4.17

Can't find any compound Sanskrit words containing sisun.