[1] : The Collaborative International Dictionary of English v.0.48

sickle \sic"kle\, n. oe. sikel, as. sicol; akin to d. sikkel,
   g. sichel, ohg. sihhila, dan. segel, segl, l. secula, fr.
   secare to cut; or perhaps from l. secula. see saw a cutting
   instrument.
   1. a reaping instrument consisting of a steel blade curved
      into the form of a hook, and having a handle fitted on a
      tang. the sickle has one side of the blade notched, so as
      always to sharpen with a serrated edge. cf. reaping
      hook, under reap.
      1913 webster

            when corn has once felt the sickle, it has no more
            benefit from the sunshine.            --shak.
      1913 webster

   2. astron. a group of stars in the constellation leo. see
      illust. of leo.
      1913 webster

   sickle pod bot., a kind of rock cress arabis
      canadensis having very long curved pods.
      1913 webster
see also:
saw reaping hook reap leo sickle pod arabis canadensis 

[2] : WordNet (r) 2.0

sickle
     n : an edge tool for cutting grass or crops; has a curved blade
         and a short handle syn: reaping hook, reap hook
see also:
reaping hook reap hook 

[3] : Easton's 1897 Bible Dictionary

sickle
   of the egyptians resembled that in modern use. the ears of corn
   were cut with it near the top of the straw. there was also a
   sickle used for warlike purposes, more correctly, however,
   called a pruning-hook deut. 16:9; jer. 50:16, marg., "scythe;"
   joel 3:13; mark 4:29.
   

Sickle >> S Words
Sickle, definition of term: Sickle
sickle_pag1.html