disc in WordNet English dictionary

1. a flat circular plate
   disk  disc 
   
2. sound recording consisting of a disk with a continuous groove; used to reproduce music by rotating while a phonograph needle tracks in the groove
   phonograph record  phonograph recording  record  disk  disc  platter 
   
3. (computer science) a memory device consisting of a flat disk covered with a magnetic coating on which information is stored
   magnetic disk  magnetic disc  disk  disc 
   
4. something with a round shape resembling a flat circular plate
   "the moon's disk hung in a cloudless sky"
   disk  disc  saucer