- Each of the long middle feathers of a cock’s tail.More example sentences
- The length from the large fowl male's beak to the end of his sickle feather is about 24 inches.
- The tail of a Yokohama is not marked by very long sickle feathers but the well developed saddle feathers.
- These smaller sickle feathers are much like the main sickles but are shorter.
More definitions of sickle featherDefinition of sickle feather in:
- The US English dictionary