Meaning of the Sanskrit Word: jyotisam

  jyotisam—by luminaries    SB 4.9.20, SB 4.9.21, SB 4.9.20-21
  jyotisam—of all luminaries    Bg 10.21
  jyotisam—of all the luminaries    SB 9.5.3
  jyotisam—of the sun and other luminaries    SB 6.1.4, SB 6.1.5, SB 6.1.4-5
  jyotisam—of luminaries    SB 4.12.39
  jyotisam—knowledge of astrology (along with other aspects of culture in human society, and specifically in civilized society, there must be knowledge of astrology)    SB 10.8.5
  jyotisam—of the luminaries    SB 5.16.1
  jyotisam—of the luminaries like the sun and moon    SB 6.12.33
  jyotisam—in all luminous objects    Bg 13.18

Can't find any compound Sanskrit words containing jyotisam.