sickle

noun

An implement having a semicircular blade attached to a short handle, used for cutting grain or tall grass.

noun

The cutting mechanism of a reaper or mower.

intransitive verb

To cut with a sickle.

intransitive verb

To deform (a red blood cell) into an abnormal crescent shape.

intransitive verb

To assume an abnormal crescent shape. Used of red blood cells.

adjective

Shaped like the blade of a sickle; crescent-shaped.

noun

A reaping-hook; a curved blade of steel (anciently also of bronze) having the edge on the inner side of the curve, with a short handle or haft, for cutting with the right hand grain or grass which is grasped by the left.

noun

A sickle-shaped sharp-edged spur or gaff formerly used in cock-fighting.

noun

In embryology, a crescentie thickening at the posterior edge of the blastodisc in certain vertebrate embryos with meroblastic eggs, such as the fishes and reptiles.

noun

A crescentie whitish area in the choroid commonly observed in cases of myopia.