Perseus analyses of μίστυλλόν:

1. μίστυλλον (piece of meat): neut nom/voc/acc sg
2. μιστύλλω (cut up): imperf ind act 3rd pl (homeric ionic)
3. μιστύλλω (cut up): imperf ind act 1st sg (homeric ionic)

LSJ entries

μίστυλλον 

μιστύλλω