Skein

Skein may refer to:
 * A flock of geese or ducks in flight
 * A wound ball of yarn with a centre pull strand; see Hank
 * A metal piece fitted over the end of a wagon axle, to which the wheel is mounted
 * Skein (unit), a unit of length used by weavers and tailors
 * Skein dubh, a Scottish knife
 * Skein (fish), the egg sack of the fish eggs and/or the eggs themselves
 * Skein module, a mathematical concept
 * Skein relation, a mathematical concept often used to give a simple definition of knot polynomials
 * Skein (comics), a fictional supervillain in the Marvel Comics universe
 * Skein (hash function), a candidate hash function to the NIST hash function competition from Bruce Schneier et al.