Slough

1. The skin, commonly the cast-off skin, of a serpent or of some similar animal.
2. Slow.
3. A wet place; a swale; a side channel or inlet from a river.
4. To cast off; to discard as refuse.
5. The dead mass separating from a foul sore; the dead part which separates from the living tissue in mortification.
6. imp. of Slee, to slay. Slew.
7. A place of deep mud or mire; a hole full of mire.
8. To form a slough; to separate in the form of dead matter from the living tissues; -- often used with off, or away; as, a sloughing ulcer; the dead tissues slough off slowly.