accretion disc

/AH0 K R IY1 SH AH0 N D IH0 S K/
noun
  1. 1

    A structure formed by matter falling into a gravitational source such as a galaxy, black hole, or protostar.

Source: https://en.wiktionary.org/wiki/accretion%20disc, https://en.wiktionary.org/wiki/accretion%20disk