Aye,hanging on here in sunny Lancs.

What does roll call mean? Roll call is a noun phrase. It refers to the practice of reading from a list of names to check attendance.
Roll call is a common practice in classrooms and other settings where attendance is mandatory or important.
I have included some example sentences below.

  • Mark did not make roll call Tuesday morning, and now has to muck out the horse stalls as punishment.
  • Before the teacher was able to finish roll call, the class had already erupted into loud chatter.
  • Then the fans in right field performed their first roll call of the season. Vinny Milano, the roll call’s longtime leader, is no longer part of the ritual. –The New York Times

If you were going to use this phrase as a verb, you would reverse it, forming call roll. Calling roll is another way to say taking attendance. Additionally, if you were to use this as an adjective you would hyphenated it.