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sickle |
Also found in: Dictionary/thesaurus, Medical, Legal, Wikipedia, Hutchinson | 0.01 sec. |
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sickle an implement for cutting grass, corn, etc., having a curved blade and a short handle sickle [′sik·əl] (agriculture) The cutting mechanism of a binder, reaper, or combine. (design engineering) A hand tool consisting of a hooked metal blade with a short handle, used for cutting grain or other agricultural products. (textiles) A hooked arm for guiding the thread in a spinning mule. Sickle [′sik·əl] (astronomy) A group of six stars in the constellation Leo that outline the head of the lion. How to thank TFD for its existence? Tell a friend about us, add a link to this page, add the site to iGoogle, or visit webmaster's page for free fun content. |
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| 2] tension, adequate to cause the reversal of the sickling process (5). To see whether this prevented blood cells from sickling, they injected the marrow into healthy mice whose own marrow had been irradiated and wiped out. This study, in turn, confirmed hypotheses which had postulated that sickle trait offered malaria protection, and triggered research campaigns which turned up more sickling anomalies, along with thalassemia traits and blood anomalies--mostly, but not exclusive ly, among Africans or those of African descent--that conferred protection against falciparum malaria. |
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