What is the meaning of Sickle?

An implement having a semicircular blade and short handle, used for cutting long grass and cereal crops.

Anything resembling a sickle, especially:

  1. A sickle faether, any of the sickle-shaped rear feathers of the domestic cock.
  2. The crescent moon.

A sickle faether, any of the sickle-shaped rear feathers of the domestic cock.

The crescent moon.

To cut with a sickle.

Of red blood cells: to assume an abnormal crescent shape.

To deform (as with a red blood cell) into an abnormal crescent shape, to cause to sickle.

Source: wiktionary.org