[sick.le] n [ME sikel, fr. OE sicol, fr. L secula sickle, fr. secare to cut--more at saw] (bef. 12c) 1: an agricultural implement consisting of a curved metal blade with a short handle fitted on a tang
2: the cutting mechanism (as of a reaper, combine, or mower) consisting of a bar with a series of cutting elements
[2]sickle adj (1688): having the form of a sickle blade: having a curve similar to that of a sickle blade "the ~ moon" [3]sickle vb sick.led ; sick.ling vt (1922) 1: to mow or reap with a sickle
2: to change (a red blood cell) into a sickle cell ~ vi: to change into a sickle cell "the ability of red blood cells to ~"