Game pieces in Othello and Connect Four (5)
![Ross](/clue/static/ross-mug.min.png)
I believe the answer is:
discs
(Other definitions for discs that I've seen before include "Type of recordings" , "Flat, thin circular objects" , "Layers of cartilage between vertebrae - they may slip" , "Flat, circular plates" , "They're round and flat" .)