Sickle

Noun

 * 1)  an implement, having a semicircular blade and short handle, used for cutting long grass and cereal crops

Synonyms

 * reap hook
 * reaping hook

Verb

 * 1)  To cut with a sickle
 * 2)  To deform (as with a red blood cell) into an abnormal crescent shape.
 * 3)  To assume an abnormal crescent shape. Used of red blood cells.

Derived terms

 * sickler

Adjective

 * 1) Shaped like the blade of a sickle; crescent-shaped.
 * a sickle moon